/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:05:34,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:05:34,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:05:34,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:05:34,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:05:34,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:05:34,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:05:34,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:05:34,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:05:34,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:05:34,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:05:34,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:05:34,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:05:34,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:05:34,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:05:34,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:05:34,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:05:34,866 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 19:05:34,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:05:34,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:05:34,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:05:34,897 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:05:34,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:05:34,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:05:34,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:05:34,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:05:34,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:05:34,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:05:34,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:05:34,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:05:34,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:05:34,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:05:34,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:05:34,903 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:05:34,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:05:34,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:05:34,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:05:34,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:05:34,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:05:34,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:05:34,905 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:05:35,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:05:35,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:05:35,251 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:05:35,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:05:35,253 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:05:35,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-22 19:05:35,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6607d07/09e0a98285a547b1adbf6e3aa99f55e9/FLAG6a3e31e6b [2020-08-22 19:05:35,797 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:05:35,798 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-08-22 19:05:35,805 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6607d07/09e0a98285a547b1adbf6e3aa99f55e9/FLAG6a3e31e6b [2020-08-22 19:05:36,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa6607d07/09e0a98285a547b1adbf6e3aa99f55e9 [2020-08-22 19:05:36,151 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:05:36,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:05:36,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:05:36,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:05:36,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:05:36,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:05:36" (1/1) ... [2020-08-22 19:05:36,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477ebec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36, skipping insertion in model container [2020-08-22 19:05:36,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:05:36" (1/1) ... [2020-08-22 19:05:36,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:05:36,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:05:36,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:05:36,397 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:05:36,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:05:36,529 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:05:36,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36 WrapperNode [2020-08-22 19:05:36,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:05:36,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:05:36,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:05:36,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:05:36,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36" (1/1) ... [2020-08-22 19:05:36,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36" (1/1) ... [2020-08-22 19:05:36,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36" (1/1) ... [2020-08-22 19:05:36,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36" (1/1) ... [2020-08-22 19:05:36,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36" (1/1) ... [2020-08-22 19:05:36,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36" (1/1) ... [2020-08-22 19:05:36,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36" (1/1) ... [2020-08-22 19:05:36,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:05:36,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:05:36,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:05:36,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:05:36,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36" (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 19:05:36,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:05:36,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:05:36,646 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-22 19:05:36,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:05:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:05:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:05:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 19:05:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:05:36,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:05:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:05:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:05:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:05:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:05:36,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:05:36,991 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:05:36,991 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 19:05:36,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:05:36 BoogieIcfgContainer [2020-08-22 19:05:36,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:05:36,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:05:36,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:05:37,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:05:37,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:05:36" (1/3) ... [2020-08-22 19:05:37,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a01fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:05:37, skipping insertion in model container [2020-08-22 19:05:37,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:05:36" (2/3) ... [2020-08-22 19:05:37,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a01fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:05:37, skipping insertion in model container [2020-08-22 19:05:37,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:05:36" (3/3) ... [2020-08-22 19:05:37,004 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-08-22 19:05:37,014 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:05:37,021 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:05:37,035 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:05:37,058 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:05:37,059 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:05:37,059 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:05:37,059 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:05:37,059 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:05:37,060 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:05:37,060 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:05:37,060 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:05:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-08-22 19:05:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 19:05:37,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:37,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:37,089 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:37,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-08-22 19:05:37,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:37,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308813742] [2020-08-22 19:05:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:37,160 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 19:05:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,350 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 19:05:37,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308813742] [2020-08-22 19:05:37,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:37,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:05:37,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410672077] [2020-08-22 19:05:37,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:05:37,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:05:37,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:05:37,384 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-08-22 19:05:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:37,594 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-08-22 19:05:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:05:37,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-08-22 19:05:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:37,608 INFO L225 Difference]: With dead ends: 102 [2020-08-22 19:05:37,608 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 19:05:37,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:05:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 19:05:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-22 19:05:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 19:05:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-22 19:05:37,658 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-08-22 19:05:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:37,659 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-22 19:05:37,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:05:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-22 19:05:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 19:05:37,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:37,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:37,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:05:37,662 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-08-22 19:05:37,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:37,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6030607] [2020-08-22 19:05:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:37,666 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 19:05:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:37,772 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 19:05:37,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6030607] [2020-08-22 19:05:37,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:37,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:05:37,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002835801] [2020-08-22 19:05:37,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:05:37,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:37,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:05:37,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:05:37,776 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-08-22 19:05:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:37,909 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-08-22 19:05:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:05:37,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-08-22 19:05:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:37,912 INFO L225 Difference]: With dead ends: 92 [2020-08-22 19:05:37,912 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 19:05:37,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:05:37,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 19:05:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-08-22 19:05:37,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 19:05:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 19:05:37,936 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-08-22 19:05:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:37,937 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 19:05:37,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:05:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 19:05:37,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 19:05:37,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:37,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:37,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:05:37,942 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:37,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-08-22 19:05:37,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:37,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548569716] [2020-08-22 19:05:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:37,988 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:38,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:05:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:38,126 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 19:05:38,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548569716] [2020-08-22 19:05:38,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:38,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:05:38,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915943545] [2020-08-22 19:05:38,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:05:38,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:38,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:05:38,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:05:38,129 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-08-22 19:05:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:38,298 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-08-22 19:05:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:05:38,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-08-22 19:05:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:38,301 INFO L225 Difference]: With dead ends: 102 [2020-08-22 19:05:38,301 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 19:05:38,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:05:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 19:05:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-08-22 19:05:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 19:05:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-08-22 19:05:38,313 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-08-22 19:05:38,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:38,313 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-08-22 19:05:38,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:05:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-08-22 19:05:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 19:05:38,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:38,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:38,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:05:38,316 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:38,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-08-22 19:05:38,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:38,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262684196] [2020-08-22 19:05:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:38,331 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:38,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:38,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 19:05:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:38,443 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 19:05:38,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262684196] [2020-08-22 19:05:38,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:38,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:05:38,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722812573] [2020-08-22 19:05:38,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:05:38,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:38,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:05:38,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:05:38,446 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-08-22 19:05:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:38,636 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-08-22 19:05:38,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:05:38,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-08-22 19:05:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:38,641 INFO L225 Difference]: With dead ends: 112 [2020-08-22 19:05:38,642 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 19:05:38,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:05:38,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 19:05:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-08-22 19:05:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 19:05:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-08-22 19:05:38,664 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-08-22 19:05:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:38,665 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-08-22 19:05:38,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:05:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-08-22 19:05:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 19:05:38,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:38,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:38,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:05:38,669 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:38,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-08-22 19:05:38,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:38,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79641871] [2020-08-22 19:05:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:38,682 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:38,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:38,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 19:05:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:05:38,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79641871] [2020-08-22 19:05:38,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:38,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:05:38,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679116533] [2020-08-22 19:05:38,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:05:38,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:38,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:05:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:05:38,875 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-08-22 19:05:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:39,102 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-08-22 19:05:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:05:39,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 19:05:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:39,105 INFO L225 Difference]: With dead ends: 122 [2020-08-22 19:05:39,105 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 19:05:39,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:05:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 19:05:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-08-22 19:05:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 19:05:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-22 19:05:39,117 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-08-22 19:05:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:39,118 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-22 19:05:39,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:05:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-22 19:05:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 19:05:39,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:39,120 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:05:39,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:05:39,120 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-08-22 19:05:39,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:39,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336344780] [2020-08-22 19:05:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:39,128 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:39,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:39,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 19:05:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:39,314 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 19:05:39,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336344780] [2020-08-22 19:05:39,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:39,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:05:39,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149476270] [2020-08-22 19:05:39,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:05:39,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:39,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:05:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:05:39,328 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-08-22 19:05:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:39,582 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-08-22 19:05:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:05:39,583 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-08-22 19:05:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:39,584 INFO L225 Difference]: With dead ends: 132 [2020-08-22 19:05:39,585 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 19:05:39,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:05:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 19:05:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-08-22 19:05:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 19:05:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-08-22 19:05:39,613 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-08-22 19:05:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:39,613 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-08-22 19:05:39,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:05:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-08-22 19:05:39,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 19:05:39,617 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:39,617 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:39,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:05:39,620 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:39,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-08-22 19:05:39,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:39,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411662070] [2020-08-22 19:05:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:39,628 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:39,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:39,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 19:05:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:39,844 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 19:05:39,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411662070] [2020-08-22 19:05:39,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:39,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:05:39,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156208113] [2020-08-22 19:05:39,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:05:39,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:39,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:05:39,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:05:39,848 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-08-22 19:05:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:40,130 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-08-22 19:05:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:05:40,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-08-22 19:05:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:40,132 INFO L225 Difference]: With dead ends: 142 [2020-08-22 19:05:40,132 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 19:05:40,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-08-22 19:05:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 19:05:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-08-22 19:05:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 19:05:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-08-22 19:05:40,158 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-08-22 19:05:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:40,158 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-08-22 19:05:40,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:05:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-08-22 19:05:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-22 19:05:40,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:40,163 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:40,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:05:40,163 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:40,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:40,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-08-22 19:05:40,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:40,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4643679] [2020-08-22 19:05:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:40,180 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:40,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:40,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 19:05:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:40,425 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 19:05:40,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4643679] [2020-08-22 19:05:40,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:40,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 19:05:40,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926966142] [2020-08-22 19:05:40,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:05:40,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:40,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:05:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:05:40,428 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-08-22 19:05:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:40,753 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-08-22 19:05:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 19:05:40,753 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-08-22 19:05:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:40,755 INFO L225 Difference]: With dead ends: 152 [2020-08-22 19:05:40,755 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 19:05:40,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-08-22 19:05:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 19:05:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-08-22 19:05:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 19:05:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-08-22 19:05:40,765 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-08-22 19:05:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:40,766 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-08-22 19:05:40,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:05:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-08-22 19:05:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 19:05:40,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:40,771 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:40,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:05:40,771 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:40,772 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-08-22 19:05:40,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:40,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119935376] [2020-08-22 19:05:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:40,782 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:41,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:41,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 19:05:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:41,043 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 19:05:41,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119935376] [2020-08-22 19:05:41,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:41,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:05:41,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235177160] [2020-08-22 19:05:41,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:05:41,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:41,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:05:41,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:05:41,046 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-08-22 19:05:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:41,457 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-08-22 19:05:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 19:05:41,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-08-22 19:05:41,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:41,460 INFO L225 Difference]: With dead ends: 162 [2020-08-22 19:05:41,460 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 19:05:41,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-08-22 19:05:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 19:05:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-08-22 19:05:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-22 19:05:41,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-08-22 19:05:41,481 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-08-22 19:05:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:41,481 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-08-22 19:05:41,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:05:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-08-22 19:05:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 19:05:41,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:41,488 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:41,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:05:41,489 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:41,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:41,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-08-22 19:05:41,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:41,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257176404] [2020-08-22 19:05:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:41,504 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:41,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:41,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 19:05:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:41,802 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 19:05:41,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257176404] [2020-08-22 19:05:41,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:41,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 19:05:41,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918958544] [2020-08-22 19:05:41,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 19:05:41,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:41,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 19:05:41,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:05:41,805 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-08-22 19:05:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:42,233 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-08-22 19:05:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 19:05:42,233 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-08-22 19:05:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:42,235 INFO L225 Difference]: With dead ends: 172 [2020-08-22 19:05:42,235 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 19:05:42,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 19:05:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 19:05:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-08-22 19:05:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-22 19:05:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-08-22 19:05:42,249 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-08-22 19:05:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:42,250 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-08-22 19:05:42,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 19:05:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-08-22 19:05:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-22 19:05:42,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:42,252 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:42,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:05:42,253 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-08-22 19:05:42,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:42,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284446733] [2020-08-22 19:05:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:42,260 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:42,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:42,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 19:05:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:05:42,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284446733] [2020-08-22 19:05:42,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:42,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-08-22 19:05:42,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125382878] [2020-08-22 19:05:42,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 19:05:42,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:42,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 19:05:42,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:05:42,601 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-08-22 19:05:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:43,128 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-08-22 19:05:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 19:05:43,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-08-22 19:05:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:43,129 INFO L225 Difference]: With dead ends: 182 [2020-08-22 19:05:43,129 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 19:05:43,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 19:05:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 19:05:43,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-08-22 19:05:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 19:05:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-08-22 19:05:43,139 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-08-22 19:05:43,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:43,139 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-08-22 19:05:43,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 19:05:43,139 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-08-22 19:05:43,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-22 19:05:43,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:43,141 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:43,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:05:43,141 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:43,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:43,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-08-22 19:05:43,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:43,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57685630] [2020-08-22 19:05:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:43,149 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:43,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:43,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 19:05:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:05:43,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57685630] [2020-08-22 19:05:43,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:43,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-08-22 19:05:43,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249462135] [2020-08-22 19:05:43,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 19:05:43,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:43,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 19:05:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-08-22 19:05:43,560 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-08-22 19:05:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:44,239 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-08-22 19:05:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 19:05:44,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-08-22 19:05:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:44,242 INFO L225 Difference]: With dead ends: 192 [2020-08-22 19:05:44,242 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 19:05:44,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 19:05:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 19:05:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-08-22 19:05:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-08-22 19:05:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-08-22 19:05:44,257 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-08-22 19:05:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:44,258 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-08-22 19:05:44,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 19:05:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-08-22 19:05:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-22 19:05:44,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:44,262 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:44,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:05:44,262 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-08-22 19:05:44,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:44,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190019400] [2020-08-22 19:05:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:44,270 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:44,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:44,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 19:05:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:44,665 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 19:05:44,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190019400] [2020-08-22 19:05:44,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:44,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-08-22 19:05:44,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055277671] [2020-08-22 19:05:44,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 19:05:44,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:44,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 19:05:44,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-08-22 19:05:44,668 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-08-22 19:05:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:45,249 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-08-22 19:05:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 19:05:45,249 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-08-22 19:05:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:45,251 INFO L225 Difference]: With dead ends: 202 [2020-08-22 19:05:45,251 INFO L226 Difference]: Without dead ends: 172 [2020-08-22 19:05:45,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 19:05:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-08-22 19:05:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-08-22 19:05:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-22 19:05:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-08-22 19:05:45,261 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-08-22 19:05:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:45,262 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-08-22 19:05:45,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 19:05:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-08-22 19:05:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-22 19:05:45,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:45,264 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:45,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:05:45,265 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:45,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-08-22 19:05:45,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:45,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873880347] [2020-08-22 19:05:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:45,271 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:45,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:45,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 19:05:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:05:45,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873880347] [2020-08-22 19:05:45,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:45,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-08-22 19:05:45,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590275655] [2020-08-22 19:05:45,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 19:05:45,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:45,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 19:05:45,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-08-22 19:05:45,710 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-08-22 19:05:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:46,490 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-08-22 19:05:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 19:05:46,490 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-08-22 19:05:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:46,492 INFO L225 Difference]: With dead ends: 212 [2020-08-22 19:05:46,492 INFO L226 Difference]: Without dead ends: 182 [2020-08-22 19:05:46,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 19:05:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-22 19:05:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-08-22 19:05:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 19:05:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-08-22 19:05:46,502 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-08-22 19:05:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:46,502 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-08-22 19:05:46,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 19:05:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-08-22 19:05:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-22 19:05:46,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:46,504 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:46,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:05:46,505 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-08-22 19:05:46,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:46,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210149386] [2020-08-22 19:05:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:46,511 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:46,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:46,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-22 19:05:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:46,994 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 19:05:46,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210149386] [2020-08-22 19:05:46,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:46,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-08-22 19:05:46,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777668725] [2020-08-22 19:05:46,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 19:05:46,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 19:05:46,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-08-22 19:05:46,996 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-08-22 19:05:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:47,790 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-08-22 19:05:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 19:05:47,790 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-08-22 19:05:47,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:47,792 INFO L225 Difference]: With dead ends: 222 [2020-08-22 19:05:47,792 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 19:05:47,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 19:05:47,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 19:05:47,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-08-22 19:05:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 19:05:47,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-08-22 19:05:47,812 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-08-22 19:05:47,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:47,812 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-08-22 19:05:47,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 19:05:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-08-22 19:05:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-08-22 19:05:47,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:47,815 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:47,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:05:47,815 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:47,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:47,815 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-08-22 19:05:47,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:47,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847145584] [2020-08-22 19:05:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:47,824 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:48,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:48,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-22 19:05:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:48,449 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 19:05:48,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847145584] [2020-08-22 19:05:48,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:48,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-08-22 19:05:48,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014634733] [2020-08-22 19:05:48,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 19:05:48,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:48,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 19:05:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-08-22 19:05:48,455 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-08-22 19:05:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:49,350 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-08-22 19:05:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 19:05:49,351 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-08-22 19:05:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:49,353 INFO L225 Difference]: With dead ends: 232 [2020-08-22 19:05:49,353 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 19:05:49,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 19:05:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 19:05:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-08-22 19:05:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-08-22 19:05:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-08-22 19:05:49,363 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-08-22 19:05:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:49,364 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-08-22 19:05:49,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 19:05:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-08-22 19:05:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-08-22 19:05:49,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:49,366 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:49,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:05:49,367 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:49,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-08-22 19:05:49,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:49,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266531547] [2020-08-22 19:05:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:49,374 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:49,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:49,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-22 19:05:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:49,960 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 19:05:49,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266531547] [2020-08-22 19:05:49,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:49,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-08-22 19:05:49,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702663492] [2020-08-22 19:05:49,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 19:05:49,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 19:05:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 19:05:49,964 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-08-22 19:05:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:50,963 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-08-22 19:05:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 19:05:50,963 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-08-22 19:05:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:50,965 INFO L225 Difference]: With dead ends: 242 [2020-08-22 19:05:50,965 INFO L226 Difference]: Without dead ends: 212 [2020-08-22 19:05:50,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 19:05:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-08-22 19:05:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-08-22 19:05:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 19:05:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-08-22 19:05:50,979 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-08-22 19:05:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:50,980 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-08-22 19:05:50,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 19:05:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-08-22 19:05:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-08-22 19:05:50,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:50,982 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:50,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 19:05:50,982 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:50,983 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-08-22 19:05:50,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:50,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750710741] [2020-08-22 19:05:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:50,990 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:51,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:51,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-22 19:05:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:51,614 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 19:05:51,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750710741] [2020-08-22 19:05:51,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:51,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-08-22 19:05:51,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910226539] [2020-08-22 19:05:51,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 19:05:51,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 19:05:51,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 19:05:51,617 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-08-22 19:05:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:52,834 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-08-22 19:05:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-22 19:05:52,835 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-08-22 19:05:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:52,837 INFO L225 Difference]: With dead ends: 252 [2020-08-22 19:05:52,837 INFO L226 Difference]: Without dead ends: 222 [2020-08-22 19:05:52,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 19:05:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-22 19:05:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-08-22 19:05:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-22 19:05:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-08-22 19:05:52,849 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-08-22 19:05:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:52,849 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-08-22 19:05:52,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 19:05:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-08-22 19:05:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-08-22 19:05:52,851 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:52,851 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:52,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 19:05:52,851 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-08-22 19:05:52,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:52,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83643412] [2020-08-22 19:05:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:52,862 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:53,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:53,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-22 19:05:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:53,503 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 19:05:53,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83643412] [2020-08-22 19:05:53,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:53,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-08-22 19:05:53,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114307745] [2020-08-22 19:05:53,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 19:05:53,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:53,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 19:05:53,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 19:05:53,506 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-08-22 19:05:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:54,698 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-08-22 19:05:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 19:05:54,700 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-08-22 19:05:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:54,702 INFO L225 Difference]: With dead ends: 262 [2020-08-22 19:05:54,702 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 19:05:54,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 19:05:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 19:05:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-08-22 19:05:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-08-22 19:05:54,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-08-22 19:05:54,714 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-08-22 19:05:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:54,714 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-08-22 19:05:54,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 19:05:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-08-22 19:05:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-22 19:05:54,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:54,716 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:54,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 19:05:54,716 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-08-22 19:05:54,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:54,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295540251] [2020-08-22 19:05:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:54,722 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:55,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:55,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-08-22 19:05:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:55,449 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 19:05:55,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295540251] [2020-08-22 19:05:55,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:55,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-08-22 19:05:55,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042120511] [2020-08-22 19:05:55,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 19:05:55,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 19:05:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 19:05:55,451 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 40 states. [2020-08-22 19:05:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:56,741 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-08-22 19:05:56,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-22 19:05:56,742 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 219 [2020-08-22 19:05:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:56,744 INFO L225 Difference]: With dead ends: 272 [2020-08-22 19:05:56,745 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 19:05:56,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 19:05:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 19:05:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2020-08-22 19:05:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-22 19:05:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-08-22 19:05:56,756 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 219 [2020-08-22 19:05:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:56,756 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-08-22 19:05:56,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 19:05:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-08-22 19:05:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-08-22 19:05:56,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:56,758 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:56,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 19:05:56,758 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:56,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:56,759 INFO L82 PathProgramCache]: Analyzing trace with hash 669563575, now seen corresponding path program 19 times [2020-08-22 19:05:56,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:56,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930096050] [2020-08-22 19:05:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:56,769 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:57,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:05:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:57,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-22 19:05:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:05:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:05:57,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930096050] [2020-08-22 19:05:57,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:05:57,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-08-22 19:05:57,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696995425] [2020-08-22 19:05:57,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 19:05:57,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:05:57,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 19:05:57,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 19:05:57,582 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 42 states. [2020-08-22 19:05:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:05:58,919 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2020-08-22 19:05:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 19:05:58,920 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 229 [2020-08-22 19:05:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:05:58,921 INFO L225 Difference]: With dead ends: 274 [2020-08-22 19:05:58,922 INFO L226 Difference]: Without dead ends: 244 [2020-08-22 19:05:58,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 19:05:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-22 19:05:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-08-22 19:05:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-22 19:05:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2020-08-22 19:05:58,933 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 229 [2020-08-22 19:05:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:05:58,933 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2020-08-22 19:05:58,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 19:05:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2020-08-22 19:05:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-08-22 19:05:58,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:05:58,935 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:58,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 19:05:58,935 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:05:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:05:58,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1024771811, now seen corresponding path program 20 times [2020-08-22 19:05:58,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:05:58,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157874454] [2020-08-22 19:05:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:05:58,942 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:05:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:05:59,077 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:05:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:05:59,215 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:05:59,287 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:05:59,287 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:05:59,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 19:05:59,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:05:59 BoogieIcfgContainer [2020-08-22 19:05:59,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:05:59,323 INFO L168 Benchmark]: Toolchain (without parser) took 23169.79 ms. Allocated memory was 145.8 MB in the beginning and 451.4 MB in the end (delta: 305.7 MB). Free memory was 103.6 MB in the beginning and 281.8 MB in the end (delta: -178.2 MB). Peak memory consumption was 127.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:59,324 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 19:05:59,325 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.63 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 103.2 MB in the beginning and 181.3 MB in the end (delta: -78.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:59,325 INFO L168 Benchmark]: Boogie Preprocessor took 43.39 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 178.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:59,326 INFO L168 Benchmark]: RCFGBuilder took 421.69 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 160.2 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:59,327 INFO L168 Benchmark]: TraceAbstraction took 22324.23 ms. Allocated memory was 202.4 MB in the beginning and 451.4 MB in the end (delta: 249.0 MB). Free memory was 160.2 MB in the beginning and 281.8 MB in the end (delta: -121.6 MB). Peak memory consumption was 127.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:05:59,329 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 375.63 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 103.2 MB in the beginning and 181.3 MB in the end (delta: -78.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.39 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 178.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.69 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 160.2 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22324.23 ms. Allocated memory was 202.4 MB in the beginning and 451.4 MB in the end (delta: 249.0 MB). Free memory was 160.2 MB in the beginning and 281.8 MB in the end (delta: -121.6 MB). Peak memory consumption was 127.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.2s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 13.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1023 SDtfs, 1875 SDslu, 11317 SDs, 0 SdLazy, 5156 SolverSat, 320 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7391 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=244occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 152 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...