/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:27:07,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:27:07,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:27:07,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:27:07,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:27:07,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:27:07,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:27:07,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:27:07,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:27:07,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:27:07,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:27:07,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:27:07,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:27:07,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:27:07,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:27:07,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:27:07,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:27:07,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:27:07,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:27:07,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:27:07,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:27:07,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:27:07,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:27:07,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:27:07,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:27:07,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:27:07,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:27:07,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:27:07,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:27:07,538 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:27:07,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:27:07,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:27:07,541 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:27:07,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:27:07,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:27:07,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:27:07,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:27:07,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:27:07,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:27:07,544 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:27:07,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:27:07,544 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:27:07,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:27:07,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:27:07,545 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:27:07,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:27:07,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:27:07,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:27:07,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:27:07,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:27:07,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:27:07,547 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:27:07,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:27:07,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:27:07,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:27:07,875 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:27:07,876 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:27:07,876 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-17 17:27:07,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8324266c3/3112ac3e1cca44579041353a85c3dfd4/FLAGe4a980215 [2020-07-17 17:27:08,364 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:27:08,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-17 17:27:08,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8324266c3/3112ac3e1cca44579041353a85c3dfd4/FLAGe4a980215 [2020-07-17 17:27:08,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8324266c3/3112ac3e1cca44579041353a85c3dfd4 [2020-07-17 17:27:08,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:27:08,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:27:08,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:27:08,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:27:08,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:27:08,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:27:08" (1/1) ... [2020-07-17 17:27:08,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9691b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08, skipping insertion in model container [2020-07-17 17:27:08,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:27:08" (1/1) ... [2020-07-17 17:27:08,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:27:08,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:27:08,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:27:08,953 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:27:08,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:27:08,991 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:27:08,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08 WrapperNode [2020-07-17 17:27:08,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:27:08,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:27:08,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:27:08,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:27:09,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08" (1/1) ... [2020-07-17 17:27:09,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08" (1/1) ... [2020-07-17 17:27:09,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08" (1/1) ... [2020-07-17 17:27:09,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08" (1/1) ... [2020-07-17 17:27:09,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08" (1/1) ... [2020-07-17 17:27:09,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08" (1/1) ... [2020-07-17 17:27:09,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08" (1/1) ... [2020-07-17 17:27:09,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:27:09,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:27:09,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:27:09,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:27:09,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08" (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 [2020-07-17 17:27:09,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:27:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:27:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-17 17:27:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:27:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:27:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:27:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-17 17:27:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 17:27:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:27:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 17:27:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 17:27:09,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 17:27:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:27:09,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:27:09,453 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:27:09,453 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-17 17:27:09,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:27:09 BoogieIcfgContainer [2020-07-17 17:27:09,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:27:09,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:27:09,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:27:09,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:27:09,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:27:08" (1/3) ... [2020-07-17 17:27:09,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dce9b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:27:09, skipping insertion in model container [2020-07-17 17:27:09,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:27:08" (2/3) ... [2020-07-17 17:27:09,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dce9b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:27:09, skipping insertion in model container [2020-07-17 17:27:09,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:27:09" (3/3) ... [2020-07-17 17:27:09,467 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-07-17 17:27:09,483 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:27:09,494 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:27:09,534 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:27:09,561 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:27:09,561 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:27:09,562 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:27:09,562 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:27:09,562 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:27:09,563 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:27:09,563 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:27:09,563 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:27:09,590 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-17 17:27:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 17:27:09,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:09,602 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] [2020-07-17 17:27:09,602 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:09,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-07-17 17:27:09,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:09,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820069268] [2020-07-17 17:27:09,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:09,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820069268] [2020-07-17 17:27:09,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:27:09,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 17:27:09,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448090160] [2020-07-17 17:27:09,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 17:27:09,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:09,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 17:27:09,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 17:27:09,856 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-07-17 17:27:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:10,032 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-07-17 17:27:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 17:27:10,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-17 17:27:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:10,046 INFO L225 Difference]: With dead ends: 102 [2020-07-17 17:27:10,046 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 17:27:10,051 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 [2020-07-17 17:27:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 17:27:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-17 17:27:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-17 17:27:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-07-17 17:27:10,101 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-07-17 17:27:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:10,102 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-07-17 17:27:10,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 17:27:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-07-17 17:27:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-17 17:27:10,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:10,104 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] [2020-07-17 17:27:10,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:27:10,105 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:10,106 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-07-17 17:27:10,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:10,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079406901] [2020-07-17 17:27:10,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:10,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079406901] [2020-07-17 17:27:10,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:27:10,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 17:27:10,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897828852] [2020-07-17 17:27:10,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 17:27:10,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:10,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 17:27:10,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 17:27:10,244 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-07-17 17:27:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:10,443 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-07-17 17:27:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 17:27:10,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-07-17 17:27:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:10,445 INFO L225 Difference]: With dead ends: 92 [2020-07-17 17:27:10,445 INFO L226 Difference]: Without dead ends: 62 [2020-07-17 17:27:10,447 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 [2020-07-17 17:27:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-17 17:27:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-07-17 17:27:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 17:27:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-17 17:27:10,459 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-07-17 17:27:10,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:10,460 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-17 17:27:10,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 17:27:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-17 17:27:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-17 17:27:10,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:10,462 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] [2020-07-17 17:27:10,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:27:10,463 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-07-17 17:27:10,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:10,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018264817] [2020-07-17 17:27:10,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:10,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018264817] [2020-07-17 17:27:10,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:10,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:27:10,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763948454] [2020-07-17 17:27:10,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:27:10,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:27:10,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:27:10,581 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-07-17 17:27:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:10,777 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-07-17 17:27:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:27:10,777 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-07-17 17:27:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:10,779 INFO L225 Difference]: With dead ends: 102 [2020-07-17 17:27:10,779 INFO L226 Difference]: Without dead ends: 72 [2020-07-17 17:27:10,780 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 [2020-07-17 17:27:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-17 17:27:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-07-17 17:27:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-17 17:27:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-07-17 17:27:10,791 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-07-17 17:27:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:10,792 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-07-17 17:27:10,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:27:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-07-17 17:27:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-17 17:27:10,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:10,795 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] [2020-07-17 17:27:10,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:27:10,795 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:10,796 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-07-17 17:27:10,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:10,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980929264] [2020-07-17 17:27:10,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:10,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980929264] [2020-07-17 17:27:10,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:10,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:27:10,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085924171] [2020-07-17 17:27:10,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:27:10,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:10,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:27:10,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:27:10,933 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-07-17 17:27:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:11,117 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-07-17 17:27:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:27:11,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-07-17 17:27:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:11,119 INFO L225 Difference]: With dead ends: 112 [2020-07-17 17:27:11,119 INFO L226 Difference]: Without dead ends: 82 [2020-07-17 17:27:11,120 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 [2020-07-17 17:27:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-17 17:27:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-07-17 17:27:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-17 17:27:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-07-17 17:27:11,133 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-07-17 17:27:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:11,133 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-07-17 17:27:11,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:27:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-07-17 17:27:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-17 17:27:11,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:11,135 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] [2020-07-17 17:27:11,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:27:11,136 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:11,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-07-17 17:27:11,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:11,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029912901] [2020-07-17 17:27:11,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:11,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029912901] [2020-07-17 17:27:11,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:11,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:27:11,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446434374] [2020-07-17 17:27:11,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:27:11,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:11,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:27:11,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:27:11,274 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-07-17 17:27:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:11,497 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-07-17 17:27:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 17:27:11,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-17 17:27:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:11,499 INFO L225 Difference]: With dead ends: 122 [2020-07-17 17:27:11,499 INFO L226 Difference]: Without dead ends: 92 [2020-07-17 17:27:11,502 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 [2020-07-17 17:27:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-17 17:27:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-07-17 17:27:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-17 17:27:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-07-17 17:27:11,518 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-07-17 17:27:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:11,518 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-07-17 17:27:11,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:27:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-07-17 17:27:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-17 17:27:11,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:11,527 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] [2020-07-17 17:27:11,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:27:11,527 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-07-17 17:27:11,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:11,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081450792] [2020-07-17 17:27:11,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:11,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081450792] [2020-07-17 17:27:11,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:11,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:27:11,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733327662] [2020-07-17 17:27:11,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:27:11,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:11,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:27:11,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:27:11,738 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-07-17 17:27:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:11,989 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-07-17 17:27:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 17:27:11,990 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-07-17 17:27:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:11,991 INFO L225 Difference]: With dead ends: 132 [2020-07-17 17:27:11,991 INFO L226 Difference]: Without dead ends: 102 [2020-07-17 17:27:11,992 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 [2020-07-17 17:27:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-17 17:27:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-07-17 17:27:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-17 17:27:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-07-17 17:27:12,004 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-07-17 17:27:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:12,005 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-07-17 17:27:12,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:27:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-07-17 17:27:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-17 17:27:12,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:12,007 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] [2020-07-17 17:27:12,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:27:12,008 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-07-17 17:27:12,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:12,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824638303] [2020-07-17 17:27:12,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:12,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824638303] [2020-07-17 17:27:12,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:12,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 17:27:12,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399320175] [2020-07-17 17:27:12,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 17:27:12,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:12,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 17:27:12,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:27:12,232 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-07-17 17:27:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:12,559 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-07-17 17:27:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 17:27:12,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-07-17 17:27:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:12,561 INFO L225 Difference]: With dead ends: 142 [2020-07-17 17:27:12,561 INFO L226 Difference]: Without dead ends: 112 [2020-07-17 17:27:12,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-07-17 17:27:12,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-17 17:27:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-07-17 17:27:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-17 17:27:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-07-17 17:27:12,574 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-07-17 17:27:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:12,574 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-07-17 17:27:12,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 17:27:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-07-17 17:27:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-17 17:27:12,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:12,576 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] [2020-07-17 17:27:12,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:27:12,577 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:12,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-07-17 17:27:12,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:12,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196374415] [2020-07-17 17:27:12,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:12,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196374415] [2020-07-17 17:27:12,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:12,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-17 17:27:12,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529200817] [2020-07-17 17:27:12,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 17:27:12,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:12,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 17:27:12,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:27:12,768 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-07-17 17:27:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:13,117 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-07-17 17:27:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 17:27:13,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-07-17 17:27:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:13,120 INFO L225 Difference]: With dead ends: 152 [2020-07-17 17:27:13,120 INFO L226 Difference]: Without dead ends: 122 [2020-07-17 17:27:13,122 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 [2020-07-17 17:27:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-17 17:27:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-07-17 17:27:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-17 17:27:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-07-17 17:27:13,141 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-07-17 17:27:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:13,142 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-07-17 17:27:13,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 17:27:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-07-17 17:27:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-17 17:27:13,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:13,144 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] [2020-07-17 17:27:13,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:27:13,144 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-07-17 17:27:13,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:13,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256681120] [2020-07-17 17:27:13,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:13,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256681120] [2020-07-17 17:27:13,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:13,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-17 17:27:13,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980306313] [2020-07-17 17:27:13,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 17:27:13,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 17:27:13,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-07-17 17:27:13,423 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-07-17 17:27:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:13,864 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-07-17 17:27:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 17:27:13,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-07-17 17:27:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:13,866 INFO L225 Difference]: With dead ends: 162 [2020-07-17 17:27:13,866 INFO L226 Difference]: Without dead ends: 132 [2020-07-17 17:27:13,868 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 [2020-07-17 17:27:13,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-17 17:27:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-07-17 17:27:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-17 17:27:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-07-17 17:27:13,877 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-07-17 17:27:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:13,878 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-07-17 17:27:13,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 17:27:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-07-17 17:27:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-07-17 17:27:13,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:13,880 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] [2020-07-17 17:27:13,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:27:13,880 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:13,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-07-17 17:27:13,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:13,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714175142] [2020-07-17 17:27:13,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:14,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714175142] [2020-07-17 17:27:14,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:14,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-17 17:27:14,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817793187] [2020-07-17 17:27:14,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 17:27:14,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:14,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 17:27:14,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:27:14,139 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-07-17 17:27:14,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:14,571 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-07-17 17:27:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 17:27:14,572 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-07-17 17:27:14,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:14,573 INFO L225 Difference]: With dead ends: 172 [2020-07-17 17:27:14,574 INFO L226 Difference]: Without dead ends: 142 [2020-07-17 17:27:14,575 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 [2020-07-17 17:27:14,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-17 17:27:14,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-07-17 17:27:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-17 17:27:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-07-17 17:27:14,595 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-07-17 17:27:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:14,597 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-07-17 17:27:14,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 17:27:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-07-17 17:27:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-07-17 17:27:14,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:14,600 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] [2020-07-17 17:27:14,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:27:14,600 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-07-17 17:27:14,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:14,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638157283] [2020-07-17 17:27:14,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:14,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638157283] [2020-07-17 17:27:14,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:14,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-17 17:27:14,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928126762] [2020-07-17 17:27:14,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 17:27:14,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:14,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 17:27:14,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:27:14,916 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-07-17 17:27:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:15,555 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-07-17 17:27:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-17 17:27:15,556 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-07-17 17:27:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:15,559 INFO L225 Difference]: With dead ends: 182 [2020-07-17 17:27:15,559 INFO L226 Difference]: Without dead ends: 152 [2020-07-17 17:27:15,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 17:27:15,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-17 17:27:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-07-17 17:27:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-17 17:27:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-07-17 17:27:15,576 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-07-17 17:27:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:15,576 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-07-17 17:27:15,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 17:27:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-07-17 17:27:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-17 17:27:15,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:15,580 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] [2020-07-17 17:27:15,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:27:15,580 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:15,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-07-17 17:27:15,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:15,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930611321] [2020-07-17 17:27:15,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:15,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930611321] [2020-07-17 17:27:15,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:15,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-17 17:27:15,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676465164] [2020-07-17 17:27:15,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-17 17:27:15,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-17 17:27:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-07-17 17:27:15,903 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-07-17 17:27:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:16,376 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-07-17 17:27:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-17 17:27:16,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-07-17 17:27:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:16,379 INFO L225 Difference]: With dead ends: 192 [2020-07-17 17:27:16,379 INFO L226 Difference]: Without dead ends: 162 [2020-07-17 17:27:16,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 17:27:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-17 17:27:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-07-17 17:27:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-17 17:27:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-07-17 17:27:16,389 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-07-17 17:27:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:16,390 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-07-17 17:27:16,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-17 17:27:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-07-17 17:27:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-07-17 17:27:16,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:16,392 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] [2020-07-17 17:27:16,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:27:16,392 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-07-17 17:27:16,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:16,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511097447] [2020-07-17 17:27:16,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:16,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511097447] [2020-07-17 17:27:16,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:16,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-17 17:27:16,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143827874] [2020-07-17 17:27:16,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 17:27:16,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:16,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 17:27:16,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-07-17 17:27:16,799 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-07-17 17:27:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:17,533 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-07-17 17:27:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-17 17:27:17,534 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-07-17 17:27:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:17,535 INFO L225 Difference]: With dead ends: 202 [2020-07-17 17:27:17,535 INFO L226 Difference]: Without dead ends: 172 [2020-07-17 17:27:17,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 17:27:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-07-17 17:27:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-07-17 17:27:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-17 17:27:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-07-17 17:27:17,549 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-07-17 17:27:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:17,549 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-07-17 17:27:17,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 17:27:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-07-17 17:27:17,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-17 17:27:17,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:17,552 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] [2020-07-17 17:27:17,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:27:17,552 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:17,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-07-17 17:27:17,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:17,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136494864] [2020-07-17 17:27:17,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:17,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136494864] [2020-07-17 17:27:17,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:17,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-17 17:27:17,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379400357] [2020-07-17 17:27:17,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-17 17:27:17,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:17,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-17 17:27:17,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-07-17 17:27:17,921 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-07-17 17:27:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:18,702 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-07-17 17:27:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-17 17:27:18,702 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-07-17 17:27:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:18,704 INFO L225 Difference]: With dead ends: 212 [2020-07-17 17:27:18,705 INFO L226 Difference]: Without dead ends: 182 [2020-07-17 17:27:18,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 17:27:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-17 17:27:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-07-17 17:27:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-07-17 17:27:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-07-17 17:27:18,721 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-07-17 17:27:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:18,721 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-07-17 17:27:18,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-17 17:27:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-07-17 17:27:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-07-17 17:27:18,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:18,725 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] [2020-07-17 17:27:18,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 17:27:18,725 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:18,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-07-17 17:27:18,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:18,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234333588] [2020-07-17 17:27:18,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:19,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234333588] [2020-07-17 17:27:19,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:19,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-07-17 17:27:19,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366802074] [2020-07-17 17:27:19,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-17 17:27:19,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-17 17:27:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-07-17 17:27:19,282 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-07-17 17:27:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:20,041 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-07-17 17:27:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-17 17:27:20,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-07-17 17:27:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:20,043 INFO L225 Difference]: With dead ends: 222 [2020-07-17 17:27:20,043 INFO L226 Difference]: Without dead ends: 192 [2020-07-17 17:27:20,045 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 [2020-07-17 17:27:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-17 17:27:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-07-17 17:27:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-17 17:27:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-07-17 17:27:20,053 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-07-17 17:27:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:20,054 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-07-17 17:27:20,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-17 17:27:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-07-17 17:27:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-07-17 17:27:20,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:20,056 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] [2020-07-17 17:27:20,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 17:27:20,056 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:20,057 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-07-17 17:27:20,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:20,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89816153] [2020-07-17 17:27:20,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:20,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89816153] [2020-07-17 17:27:20,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:20,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-07-17 17:27:20,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033366892] [2020-07-17 17:27:20,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-17 17:27:20,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:20,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-17 17:27:20,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-07-17 17:27:20,549 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-07-17 17:27:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:21,401 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-07-17 17:27:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-17 17:27:21,405 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-07-17 17:27:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:21,407 INFO L225 Difference]: With dead ends: 232 [2020-07-17 17:27:21,407 INFO L226 Difference]: Without dead ends: 202 [2020-07-17 17:27:21,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 17:27:21,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-17 17:27:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-07-17 17:27:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-17 17:27:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-07-17 17:27:21,418 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-07-17 17:27:21,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:21,418 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-07-17 17:27:21,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-17 17:27:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-07-17 17:27:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-17 17:27:21,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:21,421 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] [2020-07-17 17:27:21,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 17:27:21,421 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:21,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:21,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-07-17 17:27:21,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:21,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785699609] [2020-07-17 17:27:21,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:22,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785699609] [2020-07-17 17:27:22,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:22,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-07-17 17:27:22,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307753200] [2020-07-17 17:27:22,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-17 17:27:22,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:22,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-17 17:27:22,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 17:27:22,009 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-07-17 17:27:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:23,015 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-07-17 17:27:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-17 17:27:23,016 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-07-17 17:27:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:23,018 INFO L225 Difference]: With dead ends: 242 [2020-07-17 17:27:23,018 INFO L226 Difference]: Without dead ends: 212 [2020-07-17 17:27:23,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 17:27:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-17 17:27:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-07-17 17:27:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-17 17:27:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-07-17 17:27:23,029 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-07-17 17:27:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:23,030 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-07-17 17:27:23,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-17 17:27:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-07-17 17:27:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-17 17:27:23,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:23,032 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] [2020-07-17 17:27:23,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 17:27:23,033 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:23,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:23,033 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-07-17 17:27:23,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:23,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899530552] [2020-07-17 17:27:23,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:23,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899530552] [2020-07-17 17:27:23,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:23,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-07-17 17:27:23,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505900482] [2020-07-17 17:27:23,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-17 17:27:23,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:23,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-17 17:27:23,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 17:27:23,708 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-07-17 17:27:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:24,901 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-07-17 17:27:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-07-17 17:27:24,902 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-07-17 17:27:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:24,904 INFO L225 Difference]: With dead ends: 252 [2020-07-17 17:27:24,904 INFO L226 Difference]: Without dead ends: 222 [2020-07-17 17:27:24,906 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 [2020-07-17 17:27:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-17 17:27:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-07-17 17:27:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-17 17:27:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-07-17 17:27:24,919 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-07-17 17:27:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:24,920 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-07-17 17:27:24,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-17 17:27:24,920 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-07-17 17:27:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-07-17 17:27:24,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:24,925 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] [2020-07-17 17:27:24,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 17:27:24,925 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-07-17 17:27:24,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:24,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620918359] [2020-07-17 17:27:24,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:25,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620918359] [2020-07-17 17:27:25,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:25,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-07-17 17:27:25,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162511698] [2020-07-17 17:27:25,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-17 17:27:25,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:25,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-17 17:27:25,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 17:27:25,614 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-07-17 17:27:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:26,765 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-07-17 17:27:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-17 17:27:26,766 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-07-17 17:27:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:26,768 INFO L225 Difference]: With dead ends: 262 [2020-07-17 17:27:26,768 INFO L226 Difference]: Without dead ends: 232 [2020-07-17 17:27:26,770 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 [2020-07-17 17:27:26,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-17 17:27:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-07-17 17:27:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-07-17 17:27:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-07-17 17:27:26,779 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-07-17 17:27:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:26,780 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-07-17 17:27:26,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-17 17:27:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-07-17 17:27:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-07-17 17:27:26,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:26,781 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] [2020-07-17 17:27:26,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 17:27:26,782 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:26,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:26,782 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-07-17 17:27:26,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:26,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863683081] [2020-07-17 17:27:26,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 1548 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:27,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863683081] [2020-07-17 17:27:27,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:27,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-07-17 17:27:27,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890570741] [2020-07-17 17:27:27,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-17 17:27:27,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:27,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-17 17:27:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 17:27:27,535 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 40 states. [2020-07-17 17:27:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:28,811 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-07-17 17:27:28,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-07-17 17:27:28,811 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 219 [2020-07-17 17:27:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:28,814 INFO L225 Difference]: With dead ends: 272 [2020-07-17 17:27:28,814 INFO L226 Difference]: Without dead ends: 242 [2020-07-17 17:27:28,816 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 [2020-07-17 17:27:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-17 17:27:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2020-07-17 17:27:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-17 17:27:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-07-17 17:27:28,826 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 219 [2020-07-17 17:27:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:28,826 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-07-17 17:27:28,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-17 17:27:28,826 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-07-17 17:27:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-07-17 17:27:28,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:28,828 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] [2020-07-17 17:27:28,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 17:27:28,829 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:28,829 INFO L82 PathProgramCache]: Analyzing trace with hash 669563575, now seen corresponding path program 19 times [2020-07-17 17:27:28,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:28,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210689601] [2020-07-17 17:27:28,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:27:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1729 backedges. 0 proven. 1729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:27:29,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210689601] [2020-07-17 17:27:29,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:27:29,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-07-17 17:27:29,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560949937] [2020-07-17 17:27:29,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-17 17:27:29,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:27:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-17 17:27:29,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 17:27:29,884 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 42 states. [2020-07-17 17:27:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:27:31,273 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2020-07-17 17:27:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-17 17:27:31,274 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 229 [2020-07-17 17:27:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:27:31,277 INFO L225 Difference]: With dead ends: 274 [2020-07-17 17:27:31,277 INFO L226 Difference]: Without dead ends: 244 [2020-07-17 17:27:31,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-07-17 17:27:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-07-17 17:27:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-07-17 17:27:31,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-17 17:27:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2020-07-17 17:27:31,293 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 229 [2020-07-17 17:27:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:27:31,294 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2020-07-17 17:27:31,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-17 17:27:31,295 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2020-07-17 17:27:31,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-07-17 17:27:31,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:27:31,298 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] [2020-07-17 17:27:31,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 17:27:31,298 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:27:31,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:27:31,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1024771811, now seen corresponding path program 20 times [2020-07-17 17:27:31,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:27:31,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517021625] [2020-07-17 17:27:31,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:27:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:27:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:27:31,745 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:27:31,746 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:27:31,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 17:27:31,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:27:31 BoogieIcfgContainer [2020-07-17 17:27:31,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:27:31,879 INFO L168 Benchmark]: Toolchain (without parser) took 23140.95 ms. Allocated memory was 138.9 MB in the beginning and 472.4 MB in the end (delta: 333.4 MB). Free memory was 103.9 MB in the beginning and 381.5 MB in the end (delta: -277.5 MB). Peak memory consumption was 55.9 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:31,879 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:27:31,880 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.21 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 93.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:31,880 INFO L168 Benchmark]: Boogie Preprocessor took 118.98 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 93.3 MB in the beginning and 181.3 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:31,881 INFO L168 Benchmark]: RCFGBuilder took 346.72 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 163.0 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:31,882 INFO L168 Benchmark]: TraceAbstraction took 22416.83 ms. Allocated memory was 203.9 MB in the beginning and 472.4 MB in the end (delta: 268.4 MB). Free memory was 162.3 MB in the beginning and 381.5 MB in the end (delta: -219.1 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:27:31,885 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 138.9 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.21 ms. Allocated memory is still 138.9 MB. Free memory was 103.7 MB in the beginning and 93.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.98 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 93.3 MB in the beginning and 181.3 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.72 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 163.0 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22416.83 ms. Allocated memory was 203.9 MB in the beginning and 472.4 MB in the end (delta: 268.4 MB). Free memory was 162.3 MB in the beginning and 381.5 MB in the end (delta: -219.1 MB). Peak memory consumption was 49.3 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; VAL [ad1={2:0}] [L16] int i, j, *pa; VAL [ad1={2:0}] [L17] j=0 VAL [ad1={2:0}, j=0] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=0] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, ad1={2:0}, j=0] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-2, ad1={2:0}, j=0] [L17] j++ VAL [ad1={2:0}, j=1] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=1] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=3, ad1={2:0}, j=1] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-3, ad1={2:0}, j=1] [L17] j++ VAL [ad1={2:0}, j=2] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=2] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-4, ad1={2:0}, j=2] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=5, ad1={2:0}, j=2] [L17] j++ VAL [ad1={2:0}, j=3] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=3] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-5, ad1={2:0}, j=3] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=6, ad1={2:0}, j=3] [L17] j++ VAL [ad1={2:0}, j=4] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=4] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-6, ad1={2:0}, j=4] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=7, ad1={2:0}, j=4] [L17] j++ VAL [ad1={2:0}, j=5] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=5] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-7, ad1={2:0}, j=5] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-8, ad1={2:0}, j=5] [L17] j++ VAL [ad1={2:0}, j=6] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=6] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=9, ad1={2:0}, j=6] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-9, ad1={2:0}, j=6] [L17] j++ VAL [ad1={2:0}, j=7] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=7] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=26, ad1={2:0}, j=7] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=11, ad1={2:0}, j=7] [L17] j++ VAL [ad1={2:0}, j=8] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=8] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-11, ad1={2:0}, j=8] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-12, ad1={2:0}, j=8] [L17] j++ VAL [ad1={2:0}, j=9] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=9] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=13, ad1={2:0}, j=9] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-13, ad1={2:0}, j=9] [L17] j++ VAL [ad1={2:0}, j=10] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=10] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=14, ad1={2:0}, j=10] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-14, ad1={2:0}, j=10] [L17] j++ VAL [ad1={2:0}, j=11] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=11] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=15, ad1={2:0}, j=11] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-15, ad1={2:0}, j=11] [L17] j++ VAL [ad1={2:0}, j=12] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=12] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-16, ad1={2:0}, j=12] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=17, ad1={2:0}, j=12] [L17] j++ VAL [ad1={2:0}, j=13] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=13] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-17, ad1={2:0}, j=13] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=18, ad1={2:0}, j=13] [L17] j++ VAL [ad1={2:0}, j=14] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=14] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-18, ad1={2:0}, j=14] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=19, ad1={2:0}, j=14] [L17] j++ VAL [ad1={2:0}, j=15] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=15] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-19, ad1={2:0}, j=15] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-20, ad1={2:0}, j=15] [L17] j++ VAL [ad1={2:0}, j=16] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=16] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=21, ad1={2:0}, j=16] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-21, ad1={2:0}, j=16] [L17] j++ VAL [ad1={2:0}, j=17] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=17] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=22, ad1={2:0}, j=17] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-22, ad1={2:0}, j=17] [L17] j++ VAL [ad1={2:0}, j=18] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=18] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=23, ad1={2:0}, j=18] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-23, ad1={2:0}, j=18] [L17] j++ VAL [ad1={2:0}, j=19] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=19] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-24, ad1={2:0}, j=19] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=25, ad1={2:0}, j=19] [L17] j++ VAL [ad1={2:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={2:0}, j=20] [L21] i = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={2:0}, i=0, j=20] [L22] COND TRUE i >= 0 && i < 10 VAL [ad1={2:0}, i=0, j=20] [L23] ad2 = ad1 VAL [ad1={2:0}, ad2={2:0}, i=0, j=20] [L24] ad1[i].a = i VAL [ad1={2:0}, ad2={2:0}, i=0, j=20] [L25] pa = &ad1[i].a VAL [ad1={2:0}, ad2={2:0}, i=0, j=20, pa={2:0}] [L26] EXPR ad2[i].a VAL [ad1={2:0}, ad2={2:0}, ad2[i].a=0, i=0, j=20, pa={2:0}] [L26] i = ad2[i].a + 10 VAL [ad1={2:0}, ad2={2:0}, ad2[i].a=0, i=10, j=20, pa={2:0}] [L27] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L27] COND FALSE !(i < *pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={2:0}] [L10] EXPR ad1[b].a VAL [\old(b)=10, ad1={2:0}, ad1={2:0}, ad1[b].a=14, b=10] [L10] return ad1[b].a == b; VAL [\old(b)=10, \result=0, ad1={2:0}, ad1={2:0}, ad1[b].a=14, b=10] [L30] RET, EXPR check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L30] COND TRUE !check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L37] __VERIFIER_error() VAL [ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.1s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 13.1s, 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: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 2956 NumberOfCodeBlocks, 2956 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 2696 ConstructedInterpolants, 0 QuantifiedInterpolants, 1089560 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/11590 InterpolantCoveringCapability, 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...