/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/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:11:20,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:11:20,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:11:20,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:11:20,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:11:20,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:11:20,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:11:20,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:11:20,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:11:20,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:11:20,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:11:20,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:11:20,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:11:20,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:11:20,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:11:20,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:11:20,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:11:20,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:11:20,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:11:20,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:11:20,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:11:20,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:11:20,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:11:20,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:11:20,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:11:20,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:11:20,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:11:20,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:11:20,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:11:20,768 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:11:20,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:11:20,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:11:20,770 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:11:20,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:11:20,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:11:20,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:11:20,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:11:20,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:11:20,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:11:20,771 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:11:20,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:11:20,772 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:11:20,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:11:20,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:11:20,772 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:11:20,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:11:20,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:11:20,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:11:20,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:11:20,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:11:20,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:11:20,774 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 [2020-09-04 23:11:21,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:11:21,197 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:11:21,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:11:21,203 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:11:21,203 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:11:21,204 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-04 23:11:21,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1715dbcef/d02ba2b604a14265b9e46bad00ab8864/FLAG3b615bf12 [2020-09-04 23:11:21,814 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:11:21,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-04 23:11:21,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1715dbcef/d02ba2b604a14265b9e46bad00ab8864/FLAG3b615bf12 [2020-09-04 23:11:22,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1715dbcef/d02ba2b604a14265b9e46bad00ab8864 [2020-09-04 23:11:22,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:11:22,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:11:22,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:22,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:11:22,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:11:22,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cbfe068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22, skipping insertion in model container [2020-09-04 23:11:22,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:11:22,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:11:22,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:22,435 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:11:22,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:22,484 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:11:22,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22 WrapperNode [2020-09-04 23:11:22,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:22,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:11:22,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:11:22,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:11:22,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22" (1/1) ... [2020-09-04 23:11:22,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:11:22,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:11:22,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:11:22,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:11:22,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:11:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:11:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:11:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:11:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:11:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:11:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:11:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:11:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:11:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:11:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:11:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:11:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:11:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:11:22,915 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:11:22,916 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:11:22,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:22 BoogieIcfgContainer [2020-09-04 23:11:22,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:11:22,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:11:22,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:11:22,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:11:22,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:11:22" (1/3) ... [2020-09-04 23:11:22,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43556467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:22, skipping insertion in model container [2020-09-04 23:11:22,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:22" (2/3) ... [2020-09-04 23:11:22,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43556467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:22, skipping insertion in model container [2020-09-04 23:11:22,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:22" (3/3) ... [2020-09-04 23:11:22,956 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-09-04 23:11:22,979 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:11:22,989 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:11:23,013 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:11:23,041 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:11:23,041 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:11:23,041 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:11:23,042 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:11:23,042 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:11:23,042 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:11:23,042 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:11:23,043 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:11:23,059 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-04 23:11:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 23:11:23,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:23,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:23,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:23,078 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-09-04 23:11:23,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:23,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185920686] [2020-09-04 23:11:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:23,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185920686] [2020-09-04 23:11:23,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:23,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:11:23,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880507533] [2020-09-04 23:11:23,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:11:23,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:23,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:11:23,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:11:23,313 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-09-04 23:11:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:23,426 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-09-04 23:11:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:11:23,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-04 23:11:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:23,438 INFO L225 Difference]: With dead ends: 45 [2020-09-04 23:11:23,439 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 23:11:23,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:11:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 23:11:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 23:11:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 23:11:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-04 23:11:23,486 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-04 23:11:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:23,487 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-04 23:11:23,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:11:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-04 23:11:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 23:11:23,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:23,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:23,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:11:23,489 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:23,490 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-09-04 23:11:23,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:23,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826474467] [2020-09-04 23:11:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:23,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826474467] [2020-09-04 23:11:23,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:23,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:11:23,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596635174] [2020-09-04 23:11:23,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:11:23,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:23,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:11:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:11:23,590 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-09-04 23:11:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:23,653 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-04 23:11:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 23:11:23,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-04 23:11:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:23,655 INFO L225 Difference]: With dead ends: 31 [2020-09-04 23:11:23,655 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 23:11:23,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:11:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 23:11:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-04 23:11:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-04 23:11:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-04 23:11:23,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-04 23:11:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:23,666 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-04 23:11:23,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:11:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-04 23:11:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 23:11:23,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:23,668 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] [2020-09-04 23:11:23,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:11:23,668 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-09-04 23:11:23,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:23,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917403041] [2020-09-04 23:11:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:23,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917403041] [2020-09-04 23:11:23,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:23,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 23:11:23,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675124342] [2020-09-04 23:11:23,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:11:23,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:23,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:11:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:11:23,771 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-09-04 23:11:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:23,862 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-04 23:11:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 23:11:23,862 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-04 23:11:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:23,864 INFO L225 Difference]: With dead ends: 36 [2020-09-04 23:11:23,864 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 23:11:23,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:11:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 23:11:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-04 23:11:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 23:11:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-04 23:11:23,873 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-04 23:11:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:23,873 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-04 23:11:23,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:11:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-04 23:11:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 23:11:23,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:23,875 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:23,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:11:23,875 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:23,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:23,875 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-09-04 23:11:23,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:23,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375671353] [2020-09-04 23:11:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:23,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375671353] [2020-09-04 23:11:23,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:23,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 23:11:23,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556362977] [2020-09-04 23:11:23,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:11:23,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:23,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:11:23,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:11:23,994 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-04 23:11:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:24,141 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-04 23:11:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:11:24,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-04 23:11:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:24,143 INFO L225 Difference]: With dead ends: 41 [2020-09-04 23:11:24,143 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 23:11:24,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:11:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 23:11:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-04 23:11:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 23:11:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-04 23:11:24,152 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-04 23:11:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:24,153 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-04 23:11:24,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:11:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-04 23:11:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 23:11:24,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:24,154 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:24,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:11:24,155 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2101454679, now seen corresponding path program 3 times [2020-09-04 23:11:24,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:24,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078961387] [2020-09-04 23:11:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:24,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078961387] [2020-09-04 23:11:24,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:24,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:11:24,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830461075] [2020-09-04 23:11:24,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:11:24,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:24,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:11:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:11:24,274 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2020-09-04 23:11:24,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:24,412 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-04 23:11:24,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 23:11:24,413 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-04 23:11:24,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:24,414 INFO L225 Difference]: With dead ends: 46 [2020-09-04 23:11:24,414 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 23:11:24,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:11:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 23:11:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-04 23:11:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 23:11:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-04 23:11:24,423 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-04 23:11:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:24,424 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-04 23:11:24,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:11:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-04 23:11:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 23:11:24,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:24,425 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:24,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:11:24,426 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:24,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:24,426 INFO L82 PathProgramCache]: Analyzing trace with hash -888787463, now seen corresponding path program 4 times [2020-09-04 23:11:24,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:24,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599811102] [2020-09-04 23:11:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:24,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599811102] [2020-09-04 23:11:24,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:24,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:11:24,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279663531] [2020-09-04 23:11:24,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:11:24,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:11:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:11:24,577 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-09-04 23:11:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:24,761 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-04 23:11:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 23:11:24,762 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-09-04 23:11:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:24,763 INFO L225 Difference]: With dead ends: 51 [2020-09-04 23:11:24,763 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 23:11:24,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:11:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 23:11:24,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-09-04 23:11:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 23:11:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-04 23:11:24,771 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-04 23:11:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:24,772 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-04 23:11:24,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:11:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-04 23:11:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 23:11:24,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:24,773 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:24,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:11:24,774 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:24,774 INFO L82 PathProgramCache]: Analyzing trace with hash 899054743, now seen corresponding path program 5 times [2020-09-04 23:11:24,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:24,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499434379] [2020-09-04 23:11:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:24,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499434379] [2020-09-04 23:11:24,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:24,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 23:11:24,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126418492] [2020-09-04 23:11:24,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 23:11:24,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 23:11:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-04 23:11:24,954 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 14 states. [2020-09-04 23:11:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:25,193 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-04 23:11:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 23:11:25,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-09-04 23:11:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:25,195 INFO L225 Difference]: With dead ends: 56 [2020-09-04 23:11:25,195 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 23:11:25,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:11:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 23:11:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-04 23:11:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 23:11:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-04 23:11:25,207 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-04 23:11:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:25,207 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-04 23:11:25,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 23:11:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-04 23:11:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 23:11:25,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:25,209 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:25,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:11:25,209 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash 212115641, now seen corresponding path program 6 times [2020-09-04 23:11:25,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:25,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781697461] [2020-09-04 23:11:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:25,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:25,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781697461] [2020-09-04 23:11:25,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:25,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 23:11:25,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886437064] [2020-09-04 23:11:25,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 23:11:25,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:25,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 23:11:25,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:11:25,388 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2020-09-04 23:11:25,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:25,690 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-09-04 23:11:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 23:11:25,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-09-04 23:11:25,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:25,693 INFO L225 Difference]: With dead ends: 61 [2020-09-04 23:11:25,694 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 23:11:25,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-04 23:11:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 23:11:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-04 23:11:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-04 23:11:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-04 23:11:25,709 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-04 23:11:25,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:25,712 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-04 23:11:25,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 23:11:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-04 23:11:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 23:11:25,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:25,714 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:25,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:11:25,715 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash 382845399, now seen corresponding path program 7 times [2020-09-04 23:11:25,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:25,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369868915] [2020-09-04 23:11:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:26,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:26,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369868915] [2020-09-04 23:11:26,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:26,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 23:11:26,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305954590] [2020-09-04 23:11:26,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 23:11:26,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:26,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 23:11:26,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-04 23:11:26,028 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 18 states. [2020-09-04 23:11:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:26,438 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-09-04 23:11:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 23:11:26,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-09-04 23:11:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:26,440 INFO L225 Difference]: With dead ends: 66 [2020-09-04 23:11:26,440 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 23:11:26,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:11:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 23:11:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-09-04 23:11:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 23:11:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-04 23:11:26,450 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-04 23:11:26,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:26,451 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-04 23:11:26,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 23:11:26,451 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-04 23:11:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-04 23:11:26,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:26,453 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:26,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:11:26,454 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:26,455 INFO L82 PathProgramCache]: Analyzing trace with hash -471686279, now seen corresponding path program 8 times [2020-09-04 23:11:26,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:26,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317139045] [2020-09-04 23:11:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:26,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:26,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317139045] [2020-09-04 23:11:26,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:26,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 23:11:26,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954082389] [2020-09-04 23:11:26,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 23:11:26,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:26,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 23:11:26,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-04 23:11:26,744 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2020-09-04 23:11:27,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:27,227 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-04 23:11:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 23:11:27,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-09-04 23:11:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:27,228 INFO L225 Difference]: With dead ends: 71 [2020-09-04 23:11:27,229 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 23:11:27,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 23:11:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 23:11:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-04 23:11:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 23:11:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-04 23:11:27,238 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-04 23:11:27,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:27,238 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-04 23:11:27,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 23:11:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-04 23:11:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 23:11:27,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:27,240 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:27,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:11:27,240 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash -945326313, now seen corresponding path program 9 times [2020-09-04 23:11:27,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:27,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574243327] [2020-09-04 23:11:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:27,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:27,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574243327] [2020-09-04 23:11:27,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:27,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 23:11:27,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167700318] [2020-09-04 23:11:27,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 23:11:27,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:27,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 23:11:27,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-04 23:11:27,569 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2020-09-04 23:11:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:28,106 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-09-04 23:11:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 23:11:28,107 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-09-04 23:11:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:28,108 INFO L225 Difference]: With dead ends: 76 [2020-09-04 23:11:28,109 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 23:11:28,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:11:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 23:11:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-09-04 23:11:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-04 23:11:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-04 23:11:28,119 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-04 23:11:28,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:28,119 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-04 23:11:28,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 23:11:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-04 23:11:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-04 23:11:28,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:28,121 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:28,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 23:11:28,122 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:28,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1165216199, now seen corresponding path program 10 times [2020-09-04 23:11:28,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:28,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939093253] [2020-09-04 23:11:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:28,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:28,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939093253] [2020-09-04 23:11:28,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:28,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 23:11:28,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810800571] [2020-09-04 23:11:28,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 23:11:28,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:28,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 23:11:28,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:11:28,483 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 24 states. [2020-09-04 23:11:29,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:29,070 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-09-04 23:11:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 23:11:29,071 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-09-04 23:11:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:29,072 INFO L225 Difference]: With dead ends: 81 [2020-09-04 23:11:29,072 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 23:11:29,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 23:11:29,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 23:11:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-04 23:11:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 23:11:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-04 23:11:29,087 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-09-04 23:11:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:29,087 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-04 23:11:29,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 23:11:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-04 23:11:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-04 23:11:29,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:29,091 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:29,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 23:11:29,092 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:29,092 INFO L82 PathProgramCache]: Analyzing trace with hash 499883095, now seen corresponding path program 11 times [2020-09-04 23:11:29,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:29,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474635052] [2020-09-04 23:11:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:29,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:29,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474635052] [2020-09-04 23:11:29,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:29,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 23:11:29,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115254045] [2020-09-04 23:11:29,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 23:11:29,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:29,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 23:11:29,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-04 23:11:29,497 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 26 states. [2020-09-04 23:11:30,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:30,181 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-09-04 23:11:30,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 23:11:30,181 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-09-04 23:11:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:30,183 INFO L225 Difference]: With dead ends: 86 [2020-09-04 23:11:30,183 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 23:11:30,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 23:11:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 23:11:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-09-04 23:11:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-04 23:11:30,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-09-04 23:11:30,192 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-09-04 23:11:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:30,192 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-09-04 23:11:30,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 23:11:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-09-04 23:11:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-04 23:11:30,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:30,194 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:30,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:11:30,194 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:30,195 INFO L82 PathProgramCache]: Analyzing trace with hash 728586489, now seen corresponding path program 12 times [2020-09-04 23:11:30,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:30,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369388706] [2020-09-04 23:11:30,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:30,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369388706] [2020-09-04 23:11:30,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:30,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 23:11:30,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147887496] [2020-09-04 23:11:30,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 23:11:30,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:30,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 23:11:30,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-04 23:11:30,628 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 28 states. [2020-09-04 23:11:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:31,408 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-09-04 23:11:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-04 23:11:31,408 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2020-09-04 23:11:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:31,410 INFO L225 Difference]: With dead ends: 91 [2020-09-04 23:11:31,410 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 23:11:31,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 23:11:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 23:11:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-09-04 23:11:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-04 23:11:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-09-04 23:11:31,426 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-09-04 23:11:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:31,426 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-09-04 23:11:31,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 23:11:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-09-04 23:11:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-04 23:11:31,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:31,432 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:31,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 23:11:31,432 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:31,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:31,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1576153495, now seen corresponding path program 13 times [2020-09-04 23:11:31,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:31,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596008991] [2020-09-04 23:11:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:31,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:31,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596008991] [2020-09-04 23:11:31,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:31,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 23:11:31,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102462446] [2020-09-04 23:11:31,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 23:11:31,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:31,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 23:11:31,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-04 23:11:31,920 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 30 states. [2020-09-04 23:11:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:32,664 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-09-04 23:11:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-04 23:11:32,665 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2020-09-04 23:11:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:32,666 INFO L225 Difference]: With dead ends: 96 [2020-09-04 23:11:32,666 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 23:11:32,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 23:11:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 23:11:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-09-04 23:11:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-04 23:11:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-09-04 23:11:32,680 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-09-04 23:11:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:32,681 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-09-04 23:11:32,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 23:11:32,682 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-09-04 23:11:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 23:11:32,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:32,683 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:32,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 23:11:32,683 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:32,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:32,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1034810439, now seen corresponding path program 14 times [2020-09-04 23:11:32,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:32,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214434603] [2020-09-04 23:11:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:33,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:33,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214434603] [2020-09-04 23:11:33,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:33,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 23:11:33,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824915226] [2020-09-04 23:11:33,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 23:11:33,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:33,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 23:11:33,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-04 23:11:33,263 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 32 states. [2020-09-04 23:11:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:34,185 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-09-04 23:11:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-04 23:11:34,186 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 86 [2020-09-04 23:11:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:34,186 INFO L225 Difference]: With dead ends: 101 [2020-09-04 23:11:34,187 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 23:11:34,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 23:11:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 23:11:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-09-04 23:11:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-04 23:11:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-09-04 23:11:34,197 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-09-04 23:11:34,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:34,198 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-09-04 23:11:34,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 23:11:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-09-04 23:11:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 23:11:34,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:34,199 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:34,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 23:11:34,200 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:34,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2077177559, now seen corresponding path program 15 times [2020-09-04 23:11:34,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:34,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905866832] [2020-09-04 23:11:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:34,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:34,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905866832] [2020-09-04 23:11:34,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:34,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 23:11:34,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360682335] [2020-09-04 23:11:34,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 23:11:34,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:34,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 23:11:34,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 23:11:34,877 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 34 states. [2020-09-04 23:11:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:35,920 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-09-04 23:11:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-04 23:11:35,920 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2020-09-04 23:11:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:35,922 INFO L225 Difference]: With dead ends: 106 [2020-09-04 23:11:35,922 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 23:11:35,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 23:11:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 23:11:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-09-04 23:11:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-04 23:11:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-09-04 23:11:35,930 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2020-09-04 23:11:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:35,930 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-09-04 23:11:35,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 23:11:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-09-04 23:11:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 23:11:35,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:35,932 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:35,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 23:11:35,932 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:35,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1140437383, now seen corresponding path program 16 times [2020-09-04 23:11:35,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:35,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808761362] [2020-09-04 23:11:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:36,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:36,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808761362] [2020-09-04 23:11:36,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:36,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 23:11:36,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889878240] [2020-09-04 23:11:36,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 23:11:36,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:36,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 23:11:36,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 23:11:36,589 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 36 states. [2020-09-04 23:11:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:37,797 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-09-04 23:11:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-04 23:11:37,797 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 96 [2020-09-04 23:11:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:37,799 INFO L225 Difference]: With dead ends: 111 [2020-09-04 23:11:37,799 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 23:11:37,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 23:11:37,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 23:11:37,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-09-04 23:11:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-04 23:11:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-09-04 23:11:37,807 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 96 [2020-09-04 23:11:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:37,807 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-09-04 23:11:37,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 23:11:37,807 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-09-04 23:11:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-04 23:11:37,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:37,809 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:37,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 23:11:37,809 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1511435287, now seen corresponding path program 17 times [2020-09-04 23:11:37,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:37,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789088362] [2020-09-04 23:11:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:38,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:38,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789088362] [2020-09-04 23:11:38,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:38,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 23:11:38,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774549843] [2020-09-04 23:11:38,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 23:11:38,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 23:11:38,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 23:11:38,590 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 38 states. [2020-09-04 23:11:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:39,823 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-09-04 23:11:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 23:11:39,824 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 101 [2020-09-04 23:11:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:39,825 INFO L225 Difference]: With dead ends: 116 [2020-09-04 23:11:39,825 INFO L226 Difference]: Without dead ends: 110 [2020-09-04 23:11:39,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 23:11:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-04 23:11:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-09-04 23:11:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-04 23:11:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-09-04 23:11:39,835 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 101 [2020-09-04 23:11:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:39,835 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-09-04 23:11:39,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 23:11:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-09-04 23:11:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-04 23:11:39,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:39,836 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:39,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 23:11:39,837 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:39,837 INFO L82 PathProgramCache]: Analyzing trace with hash -967433927, now seen corresponding path program 18 times [2020-09-04 23:11:39,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:39,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294077565] [2020-09-04 23:11:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:40,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:40,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294077565] [2020-09-04 23:11:40,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:40,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 23:11:40,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528243572] [2020-09-04 23:11:40,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 23:11:40,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:40,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 23:11:40,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 23:11:40,694 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 40 states. [2020-09-04 23:11:42,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:42,147 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-09-04 23:11:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-09-04 23:11:42,148 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 106 [2020-09-04 23:11:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:42,149 INFO L225 Difference]: With dead ends: 121 [2020-09-04 23:11:42,149 INFO L226 Difference]: Without dead ends: 115 [2020-09-04 23:11:42,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 23:11:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-04 23:11:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-09-04 23:11:42,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-04 23:11:42,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-09-04 23:11:42,157 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 106 [2020-09-04 23:11:42,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:42,157 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-09-04 23:11:42,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 23:11:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-09-04 23:11:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-04 23:11:42,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:42,159 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:42,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 23:11:42,159 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:42,160 INFO L82 PathProgramCache]: Analyzing trace with hash 175935831, now seen corresponding path program 19 times [2020-09-04 23:11:42,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:42,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845956451] [2020-09-04 23:11:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:43,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:43,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845956451] [2020-09-04 23:11:43,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:43,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 23:11:43,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419833585] [2020-09-04 23:11:43,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 23:11:43,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 23:11:43,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 23:11:43,101 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 42 states. [2020-09-04 23:11:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:44,500 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-09-04 23:11:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-04 23:11:44,500 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 111 [2020-09-04 23:11:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:44,502 INFO L225 Difference]: With dead ends: 126 [2020-09-04 23:11:44,502 INFO L226 Difference]: Without dead ends: 120 [2020-09-04 23:11:44,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 23:11:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-04 23:11:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-09-04 23:11:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-04 23:11:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-09-04 23:11:44,511 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 111 [2020-09-04 23:11:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:44,511 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-09-04 23:11:44,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 23:11:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-09-04 23:11:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 23:11:44,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:44,512 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:44,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 23:11:44,512 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1072856071, now seen corresponding path program 20 times [2020-09-04 23:11:44,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:44,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216473405] [2020-09-04 23:11:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:45,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:45,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216473405] [2020-09-04 23:11:45,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:45,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 23:11:45,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579953785] [2020-09-04 23:11:45,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 23:11:45,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:45,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 23:11:45,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 23:11:45,554 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 44 states. [2020-09-04 23:11:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:47,249 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-09-04 23:11:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-04 23:11:47,252 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 116 [2020-09-04 23:11:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:47,253 INFO L225 Difference]: With dead ends: 131 [2020-09-04 23:11:47,253 INFO L226 Difference]: Without dead ends: 125 [2020-09-04 23:11:47,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 23:11:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-04 23:11:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-09-04 23:11:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-04 23:11:47,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-09-04 23:11:47,266 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 116 [2020-09-04 23:11:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:47,267 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-09-04 23:11:47,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 23:11:47,267 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-09-04 23:11:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 23:11:47,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:47,268 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:47,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 23:11:47,269 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:47,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:47,270 INFO L82 PathProgramCache]: Analyzing trace with hash 229959319, now seen corresponding path program 21 times [2020-09-04 23:11:47,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:47,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495469613] [2020-09-04 23:11:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:48,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:48,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495469613] [2020-09-04 23:11:48,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:48,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-04 23:11:48,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482662755] [2020-09-04 23:11:48,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 23:11:48,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:48,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 23:11:48,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 23:11:48,427 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 46 states. [2020-09-04 23:11:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:50,285 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-09-04 23:11:50,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-09-04 23:11:50,286 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 121 [2020-09-04 23:11:50,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:50,287 INFO L225 Difference]: With dead ends: 136 [2020-09-04 23:11:50,287 INFO L226 Difference]: Without dead ends: 130 [2020-09-04 23:11:50,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-09-04 23:11:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-04 23:11:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-09-04 23:11:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-04 23:11:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-09-04 23:11:50,295 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 121 [2020-09-04 23:11:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:50,295 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-09-04 23:11:50,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 23:11:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-09-04 23:11:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 23:11:50,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:50,296 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:50,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 23:11:50,296 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:50,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2029549241, now seen corresponding path program 22 times [2020-09-04 23:11:50,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:50,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115070517] [2020-09-04 23:11:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:51,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:51,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115070517] [2020-09-04 23:11:51,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:51,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-04 23:11:51,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350446101] [2020-09-04 23:11:51,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 23:11:51,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:51,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 23:11:51,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 23:11:51,523 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 48 states. [2020-09-04 23:11:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:53,572 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-09-04 23:11:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-09-04 23:11:53,573 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 126 [2020-09-04 23:11:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:53,575 INFO L225 Difference]: With dead ends: 141 [2020-09-04 23:11:53,575 INFO L226 Difference]: Without dead ends: 135 [2020-09-04 23:11:53,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 23:11:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-04 23:11:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-09-04 23:11:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-04 23:11:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-09-04 23:11:53,581 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 126 [2020-09-04 23:11:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:53,581 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-09-04 23:11:53,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 23:11:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-09-04 23:11:53,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-04 23:11:53,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:53,583 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:53,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 23:11:53,583 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:53,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1821135913, now seen corresponding path program 23 times [2020-09-04 23:11:53,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:53,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518958187] [2020-09-04 23:11:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:54,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:54,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518958187] [2020-09-04 23:11:54,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:54,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-04 23:11:54,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789437411] [2020-09-04 23:11:54,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 23:11:54,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:54,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 23:11:54,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 23:11:54,923 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 50 states. [2020-09-04 23:11:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:57,120 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-09-04 23:11:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-09-04 23:11:57,120 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 131 [2020-09-04 23:11:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:57,122 INFO L225 Difference]: With dead ends: 146 [2020-09-04 23:11:57,122 INFO L226 Difference]: Without dead ends: 140 [2020-09-04 23:11:57,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 23:11:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-04 23:11:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-09-04 23:11:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-04 23:11:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-09-04 23:11:57,128 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 131 [2020-09-04 23:11:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:57,129 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-09-04 23:11:57,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 23:11:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-09-04 23:11:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 23:11:57,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:57,130 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:57,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 23:11:57,130 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:57,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:57,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1910700409, now seen corresponding path program 24 times [2020-09-04 23:11:57,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:57,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576137578] [2020-09-04 23:11:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:58,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:58,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576137578] [2020-09-04 23:11:58,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:58,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-04 23:11:58,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428071803] [2020-09-04 23:11:58,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 23:11:58,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:58,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 23:11:58,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 23:11:58,622 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 52 states. [2020-09-04 23:12:00,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:00,987 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-09-04 23:12:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-09-04 23:12:00,988 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 136 [2020-09-04 23:12:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:00,990 INFO L225 Difference]: With dead ends: 151 [2020-09-04 23:12:00,990 INFO L226 Difference]: Without dead ends: 145 [2020-09-04 23:12:00,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-09-04 23:12:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-04 23:12:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-09-04 23:12:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-04 23:12:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-09-04 23:12:00,998 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 136 [2020-09-04 23:12:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:00,998 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-09-04 23:12:00,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 23:12:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-09-04 23:12:00,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-09-04 23:12:00,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:01,000 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:01,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 23:12:01,000 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:01,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1167269609, now seen corresponding path program 25 times [2020-09-04 23:12:01,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:01,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13727847] [2020-09-04 23:12:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:02,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:02,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13727847] [2020-09-04 23:12:02,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:02,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-09-04 23:12:02,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254134743] [2020-09-04 23:12:02,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-04 23:12:02,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:02,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-04 23:12:02,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 23:12:02,556 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 54 states. [2020-09-04 23:12:05,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:05,057 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-09-04 23:12:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-09-04 23:12:05,057 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2020-09-04 23:12:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:05,059 INFO L225 Difference]: With dead ends: 156 [2020-09-04 23:12:05,059 INFO L226 Difference]: Without dead ends: 150 [2020-09-04 23:12:05,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-09-04 23:12:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-04 23:12:05,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-09-04 23:12:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-04 23:12:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-09-04 23:12:05,067 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 141 [2020-09-04 23:12:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:05,068 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-09-04 23:12:05,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-04 23:12:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-09-04 23:12:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 23:12:05,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:05,069 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:05,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 23:12:05,070 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1667691463, now seen corresponding path program 26 times [2020-09-04 23:12:05,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:05,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502237930] [2020-09-04 23:12:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:06,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:06,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502237930] [2020-09-04 23:12:06,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:06,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-09-04 23:12:06,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072710429] [2020-09-04 23:12:06,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-04 23:12:06,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-04 23:12:06,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 23:12:06,744 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 56 states. [2020-09-04 23:12:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:09,389 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-09-04 23:12:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-09-04 23:12:09,390 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 146 [2020-09-04 23:12:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:09,392 INFO L225 Difference]: With dead ends: 161 [2020-09-04 23:12:09,392 INFO L226 Difference]: Without dead ends: 155 [2020-09-04 23:12:09,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-09-04 23:12:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-04 23:12:09,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-09-04 23:12:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-04 23:12:09,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-09-04 23:12:09,399 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 146 [2020-09-04 23:12:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:09,399 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-09-04 23:12:09,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-04 23:12:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-09-04 23:12:09,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-04 23:12:09,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:09,400 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:09,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 23:12:09,401 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:09,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:09,401 INFO L82 PathProgramCache]: Analyzing trace with hash -799766953, now seen corresponding path program 27 times [2020-09-04 23:12:09,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:09,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306155761] [2020-09-04 23:12:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:11,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:11,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306155761] [2020-09-04 23:12:11,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:11,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-09-04 23:12:11,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126503402] [2020-09-04 23:12:11,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-09-04 23:12:11,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:11,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-09-04 23:12:11,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 23:12:11,229 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 58 states. [2020-09-04 23:12:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:14,190 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-09-04 23:12:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-09-04 23:12:14,191 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 151 [2020-09-04 23:12:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:14,193 INFO L225 Difference]: With dead ends: 166 [2020-09-04 23:12:14,193 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 23:12:14,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-09-04 23:12:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 23:12:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-09-04 23:12:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-04 23:12:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-09-04 23:12:14,202 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 151 [2020-09-04 23:12:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:14,203 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-09-04 23:12:14,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-09-04 23:12:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-09-04 23:12:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 23:12:14,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:14,204 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:14,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 23:12:14,205 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:14,205 INFO L82 PathProgramCache]: Analyzing trace with hash 468102905, now seen corresponding path program 28 times [2020-09-04 23:12:14,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:14,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490741843] [2020-09-04 23:12:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:16,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:16,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490741843] [2020-09-04 23:12:16,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:16,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-09-04 23:12:16,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891471917] [2020-09-04 23:12:16,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-09-04 23:12:16,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:16,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-09-04 23:12:16,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 23:12:16,140 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 60 states. [2020-09-04 23:12:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:19,322 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-09-04 23:12:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-09-04 23:12:19,323 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 156 [2020-09-04 23:12:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:19,324 INFO L225 Difference]: With dead ends: 171 [2020-09-04 23:12:19,324 INFO L226 Difference]: Without dead ends: 165 [2020-09-04 23:12:19,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-09-04 23:12:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-04 23:12:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-09-04 23:12:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-04 23:12:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2020-09-04 23:12:19,332 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 156 [2020-09-04 23:12:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:19,332 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2020-09-04 23:12:19,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-09-04 23:12:19,332 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2020-09-04 23:12:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-04 23:12:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:19,333 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:19,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 23:12:19,334 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:19,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1847682153, now seen corresponding path program 29 times [2020-09-04 23:12:19,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:19,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966935109] [2020-09-04 23:12:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:21,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:21,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966935109] [2020-09-04 23:12:21,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:21,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-09-04 23:12:21,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28490238] [2020-09-04 23:12:21,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-09-04 23:12:21,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:21,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-09-04 23:12:21,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 23:12:21,398 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 62 states. [2020-09-04 23:12:24,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:24,704 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-09-04 23:12:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-09-04 23:12:24,705 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 161 [2020-09-04 23:12:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:24,707 INFO L225 Difference]: With dead ends: 176 [2020-09-04 23:12:24,707 INFO L226 Difference]: Without dead ends: 170 [2020-09-04 23:12:24,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-09-04 23:12:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-04 23:12:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-09-04 23:12:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-04 23:12:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-09-04 23:12:24,714 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 161 [2020-09-04 23:12:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:24,715 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-09-04 23:12:24,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-09-04 23:12:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-09-04 23:12:24,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 23:12:24,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:24,716 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:24,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 23:12:24,716 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:24,717 INFO L82 PathProgramCache]: Analyzing trace with hash 60285369, now seen corresponding path program 30 times [2020-09-04 23:12:24,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:24,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707845102] [2020-09-04 23:12:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:27,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:27,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707845102] [2020-09-04 23:12:27,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:27,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-09-04 23:12:27,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270685713] [2020-09-04 23:12:27,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-09-04 23:12:27,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:27,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-09-04 23:12:27,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 23:12:27,104 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 64 states. [2020-09-04 23:12:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:30,554 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-09-04 23:12:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-09-04 23:12:30,555 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 166 [2020-09-04 23:12:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:30,557 INFO L225 Difference]: With dead ends: 181 [2020-09-04 23:12:30,557 INFO L226 Difference]: Without dead ends: 175 [2020-09-04 23:12:30,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-09-04 23:12:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-04 23:12:30,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-09-04 23:12:30,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-04 23:12:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2020-09-04 23:12:30,564 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 166 [2020-09-04 23:12:30,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:30,564 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2020-09-04 23:12:30,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-09-04 23:12:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2020-09-04 23:12:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-04 23:12:30,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:30,565 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:30,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 23:12:30,566 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:30,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1790910679, now seen corresponding path program 31 times [2020-09-04 23:12:30,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:30,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059571551] [2020-09-04 23:12:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:32,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:32,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059571551] [2020-09-04 23:12:32,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:32,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-09-04 23:12:32,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877874654] [2020-09-04 23:12:32,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-09-04 23:12:32,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:32,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-09-04 23:12:32,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 23:12:32,781 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 66 states. [2020-09-04 23:12:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:36,475 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-09-04 23:12:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-09-04 23:12:36,476 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 171 [2020-09-04 23:12:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:36,477 INFO L225 Difference]: With dead ends: 186 [2020-09-04 23:12:36,477 INFO L226 Difference]: Without dead ends: 180 [2020-09-04 23:12:36,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-09-04 23:12:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-04 23:12:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-09-04 23:12:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-04 23:12:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-09-04 23:12:36,485 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 171 [2020-09-04 23:12:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:36,485 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-09-04 23:12:36,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-09-04 23:12:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-09-04 23:12:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 23:12:36,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:36,487 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:36,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 23:12:36,487 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:36,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:36,487 INFO L82 PathProgramCache]: Analyzing trace with hash 410559609, now seen corresponding path program 32 times [2020-09-04 23:12:36,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:36,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131068508] [2020-09-04 23:12:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:38,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:38,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131068508] [2020-09-04 23:12:38,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:38,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-09-04 23:12:38,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654227714] [2020-09-04 23:12:38,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-09-04 23:12:38,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:38,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-09-04 23:12:38,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 23:12:38,938 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 68 states. [2020-09-04 23:12:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:43,013 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-09-04 23:12:43,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-09-04 23:12:43,014 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 176 [2020-09-04 23:12:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:43,016 INFO L225 Difference]: With dead ends: 191 [2020-09-04 23:12:43,016 INFO L226 Difference]: Without dead ends: 185 [2020-09-04 23:12:43,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-09-04 23:12:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-04 23:12:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-09-04 23:12:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-09-04 23:12:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2020-09-04 23:12:43,027 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 176 [2020-09-04 23:12:43,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:43,027 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2020-09-04 23:12:43,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-09-04 23:12:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2020-09-04 23:12:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-04 23:12:43,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:43,028 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:43,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 23:12:43,029 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:43,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:43,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1247144425, now seen corresponding path program 33 times [2020-09-04 23:12:43,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:43,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303591847] [2020-09-04 23:12:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:45,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:45,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303591847] [2020-09-04 23:12:45,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:45,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-09-04 23:12:45,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631977597] [2020-09-04 23:12:45,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-04 23:12:45,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-04 23:12:45,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-09-04 23:12:45,687 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 70 states. [2020-09-04 23:12:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:50,073 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2020-09-04 23:12:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-09-04 23:12:50,073 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 181 [2020-09-04 23:12:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:50,075 INFO L225 Difference]: With dead ends: 196 [2020-09-04 23:12:50,075 INFO L226 Difference]: Without dead ends: 190 [2020-09-04 23:12:50,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-09-04 23:12:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-04 23:12:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-09-04 23:12:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-09-04 23:12:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-09-04 23:12:50,082 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 181 [2020-09-04 23:12:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:50,083 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-09-04 23:12:50,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-04 23:12:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-09-04 23:12:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-04 23:12:50,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:50,084 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:50,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 23:12:50,085 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:50,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1873479879, now seen corresponding path program 34 times [2020-09-04 23:12:50,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:50,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580077886] [2020-09-04 23:12:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:52,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:12:53,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580077886] [2020-09-04 23:12:53,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:53,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-09-04 23:12:53,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329002936] [2020-09-04 23:12:53,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-09-04 23:12:53,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:53,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-09-04 23:12:53,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 23:12:53,008 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 72 states. [2020-09-04 23:12:57,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:57,642 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2020-09-04 23:12:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-09-04 23:12:57,643 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 186 [2020-09-04 23:12:57,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:57,645 INFO L225 Difference]: With dead ends: 201 [2020-09-04 23:12:57,645 INFO L226 Difference]: Without dead ends: 195 [2020-09-04 23:12:57,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-09-04 23:12:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-04 23:12:57,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-09-04 23:12:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-09-04 23:12:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2020-09-04 23:12:57,651 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 186 [2020-09-04 23:12:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:57,652 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2020-09-04 23:12:57,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-09-04 23:12:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2020-09-04 23:12:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-09-04 23:12:57,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:57,653 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:57,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 23:12:57,654 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:57,654 INFO L82 PathProgramCache]: Analyzing trace with hash -61637801, now seen corresponding path program 35 times [2020-09-04 23:12:57,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:57,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931571389] [2020-09-04 23:12:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:00,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:00,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931571389] [2020-09-04 23:13:00,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:00,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-09-04 23:13:00,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148266945] [2020-09-04 23:13:00,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-04 23:13:00,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:00,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-04 23:13:00,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 23:13:00,693 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 74 states. [2020-09-04 23:13:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:05,495 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-09-04 23:13:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-09-04 23:13:05,496 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 191 [2020-09-04 23:13:05,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:05,497 INFO L225 Difference]: With dead ends: 206 [2020-09-04 23:13:05,498 INFO L226 Difference]: Without dead ends: 200 [2020-09-04 23:13:05,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-09-04 23:13:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-04 23:13:05,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-09-04 23:13:05,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-09-04 23:13:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-09-04 23:13:05,505 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 191 [2020-09-04 23:13:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:05,505 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-09-04 23:13:05,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-09-04 23:13:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-09-04 23:13:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-04 23:13:05,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:05,507 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:05,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 23:13:05,507 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash -772220423, now seen corresponding path program 36 times [2020-09-04 23:13:05,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:05,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800553800] [2020-09-04 23:13:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:08,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:08,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800553800] [2020-09-04 23:13:08,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:08,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-09-04 23:13:08,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940063818] [2020-09-04 23:13:08,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-09-04 23:13:08,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:08,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-09-04 23:13:08,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 23:13:08,704 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 76 states. [2020-09-04 23:13:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:13,826 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-09-04 23:13:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-09-04 23:13:13,827 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 196 [2020-09-04 23:13:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:13,829 INFO L225 Difference]: With dead ends: 211 [2020-09-04 23:13:13,829 INFO L226 Difference]: Without dead ends: 205 [2020-09-04 23:13:13,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-09-04 23:13:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-04 23:13:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-09-04 23:13:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-09-04 23:13:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2020-09-04 23:13:13,836 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 196 [2020-09-04 23:13:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:13,837 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2020-09-04 23:13:13,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-09-04 23:13:13,837 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2020-09-04 23:13:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-04 23:13:13,838 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:13,838 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:13,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 23:13:13,838 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:13,839 INFO L82 PathProgramCache]: Analyzing trace with hash 930042007, now seen corresponding path program 37 times [2020-09-04 23:13:13,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:13,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902634186] [2020-09-04 23:13:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:17,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:17,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902634186] [2020-09-04 23:13:17,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:17,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-09-04 23:13:17,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431618752] [2020-09-04 23:13:17,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-09-04 23:13:17,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-09-04 23:13:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-09-04 23:13:17,304 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 78 states. [2020-09-04 23:13:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:22,843 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2020-09-04 23:13:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-09-04 23:13:22,844 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 201 [2020-09-04 23:13:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:22,846 INFO L225 Difference]: With dead ends: 216 [2020-09-04 23:13:22,846 INFO L226 Difference]: Without dead ends: 210 [2020-09-04 23:13:22,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-09-04 23:13:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-04 23:13:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-09-04 23:13:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-04 23:13:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-09-04 23:13:22,852 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 201 [2020-09-04 23:13:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:22,852 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-09-04 23:13:22,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-09-04 23:13:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-09-04 23:13:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-04 23:13:22,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:22,854 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:22,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 23:13:22,854 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:22,855 INFO L82 PathProgramCache]: Analyzing trace with hash 892357817, now seen corresponding path program 38 times [2020-09-04 23:13:22,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:22,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816542481] [2020-09-04 23:13:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:26,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:26,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816542481] [2020-09-04 23:13:26,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:26,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-09-04 23:13:26,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106494192] [2020-09-04 23:13:26,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-09-04 23:13:26,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:26,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-09-04 23:13:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 23:13:26,537 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 80 states. [2020-09-04 23:13:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:32,472 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2020-09-04 23:13:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-09-04 23:13:32,473 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 206 [2020-09-04 23:13:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:32,475 INFO L225 Difference]: With dead ends: 221 [2020-09-04 23:13:32,475 INFO L226 Difference]: Without dead ends: 215 [2020-09-04 23:13:32,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-09-04 23:13:32,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-04 23:13:32,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-09-04 23:13:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-09-04 23:13:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2020-09-04 23:13:32,482 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 206 [2020-09-04 23:13:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:32,482 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2020-09-04 23:13:32,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-09-04 23:13:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2020-09-04 23:13:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-04 23:13:32,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:32,484 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:32,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 23:13:32,484 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash 246519255, now seen corresponding path program 39 times [2020-09-04 23:13:32,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:32,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548134835] [2020-09-04 23:13:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:36,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:36,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548134835] [2020-09-04 23:13:36,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:36,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-09-04 23:13:36,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299300731] [2020-09-04 23:13:36,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-09-04 23:13:36,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:36,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-09-04 23:13:36,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-09-04 23:13:36,431 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 82 states. [2020-09-04 23:13:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:42,735 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2020-09-04 23:13:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-09-04 23:13:42,736 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 211 [2020-09-04 23:13:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:42,739 INFO L225 Difference]: With dead ends: 226 [2020-09-04 23:13:42,739 INFO L226 Difference]: Without dead ends: 220 [2020-09-04 23:13:42,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-09-04 23:13:42,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-04 23:13:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-09-04 23:13:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-09-04 23:13:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2020-09-04 23:13:42,747 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 211 [2020-09-04 23:13:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:42,747 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2020-09-04 23:13:42,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-09-04 23:13:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2020-09-04 23:13:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-09-04 23:13:42,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:42,749 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:42,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 23:13:42,749 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:42,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1027125383, now seen corresponding path program 40 times [2020-09-04 23:13:42,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:42,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122679728] [2020-09-04 23:13:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:46,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:46,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122679728] [2020-09-04 23:13:46,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:46,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-09-04 23:13:46,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694022791] [2020-09-04 23:13:46,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-09-04 23:13:46,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-09-04 23:13:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 23:13:46,955 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 84 states. [2020-09-04 23:13:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:53,521 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2020-09-04 23:13:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-09-04 23:13:53,522 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 216 [2020-09-04 23:13:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:53,524 INFO L225 Difference]: With dead ends: 231 [2020-09-04 23:13:53,524 INFO L226 Difference]: Without dead ends: 225 [2020-09-04 23:13:53,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-09-04 23:13:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-04 23:13:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-09-04 23:13:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-04 23:13:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2020-09-04 23:13:53,549 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 216 [2020-09-04 23:13:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:53,550 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2020-09-04 23:13:53,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-09-04 23:13:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2020-09-04 23:13:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-09-04 23:13:53,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:53,551 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:53,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 23:13:53,551 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:53,552 INFO L82 PathProgramCache]: Analyzing trace with hash 416172823, now seen corresponding path program 41 times [2020-09-04 23:13:53,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:53,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180270918] [2020-09-04 23:13:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:57,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:13:57,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180270918] [2020-09-04 23:13:57,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:57,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-09-04 23:13:57,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992329504] [2020-09-04 23:13:57,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-09-04 23:13:57,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:57,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-09-04 23:13:57,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-09-04 23:13:57,979 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 86 states. [2020-09-04 23:14:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:04,948 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2020-09-04 23:14:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-09-04 23:14:04,949 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 221 [2020-09-04 23:14:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:04,951 INFO L225 Difference]: With dead ends: 236 [2020-09-04 23:14:04,951 INFO L226 Difference]: Without dead ends: 230 [2020-09-04 23:14:04,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-09-04 23:14:04,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-04 23:14:04,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-09-04 23:14:04,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-09-04 23:14:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2020-09-04 23:14:04,959 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 221 [2020-09-04 23:14:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:04,959 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2020-09-04 23:14:04,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-09-04 23:14:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2020-09-04 23:14:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-04 23:14:04,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:04,961 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:04,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 23:14:04,961 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:04,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:04,961 INFO L82 PathProgramCache]: Analyzing trace with hash -192290247, now seen corresponding path program 42 times [2020-09-04 23:14:04,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:04,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436594234] [2020-09-04 23:14:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:09,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:09,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436594234] [2020-09-04 23:14:09,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:09,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-09-04 23:14:09,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432340425] [2020-09-04 23:14:09,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-09-04 23:14:09,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-09-04 23:14:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-09-04 23:14:09,654 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 88 states. [2020-09-04 23:14:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:17,184 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2020-09-04 23:14:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-09-04 23:14:17,185 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 226 [2020-09-04 23:14:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:17,187 INFO L225 Difference]: With dead ends: 241 [2020-09-04 23:14:17,187 INFO L226 Difference]: Without dead ends: 235 [2020-09-04 23:14:17,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-09-04 23:14:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-04 23:14:17,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-09-04 23:14:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-09-04 23:14:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2020-09-04 23:14:17,194 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 226 [2020-09-04 23:14:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:17,195 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2020-09-04 23:14:17,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-09-04 23:14:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2020-09-04 23:14:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-09-04 23:14:17,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:17,196 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:17,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 23:14:17,197 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash 460943447, now seen corresponding path program 43 times [2020-09-04 23:14:17,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:17,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946991777] [2020-09-04 23:14:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:22,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946991777] [2020-09-04 23:14:22,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:22,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-09-04 23:14:22,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333651782] [2020-09-04 23:14:22,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-09-04 23:14:22,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-09-04 23:14:22,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-09-04 23:14:22,146 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 90 states. [2020-09-04 23:14:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:29,804 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2020-09-04 23:14:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-09-04 23:14:29,805 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 231 [2020-09-04 23:14:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:29,808 INFO L225 Difference]: With dead ends: 246 [2020-09-04 23:14:29,808 INFO L226 Difference]: Without dead ends: 240 [2020-09-04 23:14:29,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-09-04 23:14:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-04 23:14:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-09-04 23:14:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-09-04 23:14:29,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2020-09-04 23:14:29,816 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 231 [2020-09-04 23:14:29,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:29,816 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2020-09-04 23:14:29,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-09-04 23:14:29,817 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2020-09-04 23:14:29,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-04 23:14:29,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:29,818 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:29,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 23:14:29,818 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1967391993, now seen corresponding path program 44 times [2020-09-04 23:14:29,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:29,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537917599] [2020-09-04 23:14:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:35,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:35,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537917599] [2020-09-04 23:14:35,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:35,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-09-04 23:14:35,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464550334] [2020-09-04 23:14:35,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-09-04 23:14:35,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:35,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-09-04 23:14:35,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 23:14:35,088 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 92 states. [2020-09-04 23:14:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:43,510 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2020-09-04 23:14:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-09-04 23:14:43,511 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 236 [2020-09-04 23:14:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:43,514 INFO L225 Difference]: With dead ends: 251 [2020-09-04 23:14:43,514 INFO L226 Difference]: Without dead ends: 245 [2020-09-04 23:14:43,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-09-04 23:14:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-04 23:14:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-09-04 23:14:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-09-04 23:14:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2020-09-04 23:14:43,522 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 236 [2020-09-04 23:14:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:43,522 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2020-09-04 23:14:43,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-09-04 23:14:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2020-09-04 23:14:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-09-04 23:14:43,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:43,524 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:43,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 23:14:43,524 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1265042839, now seen corresponding path program 45 times [2020-09-04 23:14:43,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:43,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070104599] [2020-09-04 23:14:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:14:49,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070104599] [2020-09-04 23:14:49,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:49,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-09-04 23:14:49,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144982179] [2020-09-04 23:14:49,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-09-04 23:14:49,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:49,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-09-04 23:14:49,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-09-04 23:14:49,147 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 94 states. [2020-09-04 23:14:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:58,034 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2020-09-04 23:14:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-09-04 23:14:58,035 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 241 [2020-09-04 23:14:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:58,037 INFO L225 Difference]: With dead ends: 256 [2020-09-04 23:14:58,037 INFO L226 Difference]: Without dead ends: 250 [2020-09-04 23:14:58,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-09-04 23:14:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-04 23:14:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-09-04 23:14:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-09-04 23:14:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2020-09-04 23:14:58,044 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 241 [2020-09-04 23:14:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:58,044 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2020-09-04 23:14:58,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-09-04 23:14:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2020-09-04 23:14:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-09-04 23:14:58,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:58,045 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:58,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 23:14:58,046 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash -524175431, now seen corresponding path program 46 times [2020-09-04 23:14:58,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:58,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915737266] [2020-09-04 23:14:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:04,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:04,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915737266] [2020-09-04 23:15:04,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:04,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-09-04 23:15:04,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420671059] [2020-09-04 23:15:04,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-09-04 23:15:04,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:04,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-09-04 23:15:04,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 23:15:04,127 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 96 states. [2020-09-04 23:15:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:13,849 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2020-09-04 23:15:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-09-04 23:15:13,855 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 246 [2020-09-04 23:15:13,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:13,857 INFO L225 Difference]: With dead ends: 261 [2020-09-04 23:15:13,857 INFO L226 Difference]: Without dead ends: 255 [2020-09-04 23:15:13,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-09-04 23:15:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-04 23:15:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-09-04 23:15:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-09-04 23:15:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2020-09-04 23:15:13,894 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 246 [2020-09-04 23:15:13,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:13,894 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2020-09-04 23:15:13,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-09-04 23:15:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2020-09-04 23:15:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-09-04 23:15:13,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:13,897 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:13,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 23:15:13,897 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1941239081, now seen corresponding path program 47 times [2020-09-04 23:15:13,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:13,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481186409] [2020-09-04 23:15:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:20,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481186409] [2020-09-04 23:15:20,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:20,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2020-09-04 23:15:20,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319533524] [2020-09-04 23:15:20,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-09-04 23:15:20,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:20,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-09-04 23:15:20,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-09-04 23:15:20,219 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 98 states. [2020-09-04 23:15:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:30,247 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2020-09-04 23:15:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-09-04 23:15:30,248 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 251 [2020-09-04 23:15:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:30,250 INFO L225 Difference]: With dead ends: 266 [2020-09-04 23:15:30,250 INFO L226 Difference]: Without dead ends: 260 [2020-09-04 23:15:30,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-09-04 23:15:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-04 23:15:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-09-04 23:15:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-09-04 23:15:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2020-09-04 23:15:30,259 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 251 [2020-09-04 23:15:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:30,259 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2020-09-04 23:15:30,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-09-04 23:15:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2020-09-04 23:15:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-09-04 23:15:30,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:30,261 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:30,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 23:15:30,262 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:30,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2083587463, now seen corresponding path program 48 times [2020-09-04 23:15:30,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:30,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212678582] [2020-09-04 23:15:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:36,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:37,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212678582] [2020-09-04 23:15:37,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:37,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-09-04 23:15:37,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369963922] [2020-09-04 23:15:37,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-09-04 23:15:37,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:37,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-09-04 23:15:37,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-09-04 23:15:37,009 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 100 states. [2020-09-04 23:15:47,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:47,459 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2020-09-04 23:15:47,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-09-04 23:15:47,461 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 256 [2020-09-04 23:15:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:47,463 INFO L225 Difference]: With dead ends: 271 [2020-09-04 23:15:47,463 INFO L226 Difference]: Without dead ends: 265 [2020-09-04 23:15:47,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-09-04 23:15:47,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-04 23:15:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-09-04 23:15:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-09-04 23:15:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2020-09-04 23:15:47,470 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 256 [2020-09-04 23:15:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:47,470 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2020-09-04 23:15:47,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-09-04 23:15:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2020-09-04 23:15:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-09-04 23:15:47,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:47,472 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:47,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 23:15:47,473 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1327923177, now seen corresponding path program 49 times [2020-09-04 23:15:47,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:47,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300130915] [2020-09-04 23:15:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:54,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:54,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300130915] [2020-09-04 23:15:54,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:54,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-09-04 23:15:54,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253736487] [2020-09-04 23:15:54,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-09-04 23:15:54,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:54,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-09-04 23:15:54,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-09-04 23:15:54,678 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 102 states. [2020-09-04 23:16:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:06,187 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2020-09-04 23:16:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-09-04 23:16:06,188 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 261 [2020-09-04 23:16:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:06,190 INFO L225 Difference]: With dead ends: 276 [2020-09-04 23:16:06,190 INFO L226 Difference]: Without dead ends: 270 [2020-09-04 23:16:06,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-09-04 23:16:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-04 23:16:06,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-09-04 23:16:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-09-04 23:16:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2020-09-04 23:16:06,197 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 261 [2020-09-04 23:16:06,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:06,197 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2020-09-04 23:16:06,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-09-04 23:16:06,198 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2020-09-04 23:16:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-09-04 23:16:06,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:06,199 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:06,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-04 23:16:06,200 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:06,200 INFO L82 PathProgramCache]: Analyzing trace with hash 473419065, now seen corresponding path program 50 times [2020-09-04 23:16:06,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:06,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606653596] [2020-09-04 23:16:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:13,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 0 proven. 6175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:13,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606653596] [2020-09-04 23:16:13,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:13,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-09-04 23:16:13,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908785292] [2020-09-04 23:16:13,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-09-04 23:16:13,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:13,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-09-04 23:16:13,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-09-04 23:16:13,936 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 104 states. [2020-09-04 23:16:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:26,207 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2020-09-04 23:16:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-09-04 23:16:26,209 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 266 [2020-09-04 23:16:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:26,211 INFO L225 Difference]: With dead ends: 281 [2020-09-04 23:16:26,212 INFO L226 Difference]: Without dead ends: 275 [2020-09-04 23:16:26,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-09-04 23:16:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-09-04 23:16:26,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2020-09-04 23:16:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-04 23:16:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2020-09-04 23:16:26,224 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 266 [2020-09-04 23:16:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:26,225 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2020-09-04 23:16:26,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-09-04 23:16:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2020-09-04 23:16:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-09-04 23:16:26,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:26,227 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:26,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-09-04 23:16:26,227 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:26,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1161403049, now seen corresponding path program 51 times [2020-09-04 23:16:26,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:26,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118226193] [2020-09-04 23:16:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:34,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 0 proven. 6426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:34,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118226193] [2020-09-04 23:16:34,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:34,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-09-04 23:16:34,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476390489] [2020-09-04 23:16:34,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-09-04 23:16:34,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:34,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-09-04 23:16:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-09-04 23:16:34,497 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 106 states. [2020-09-04 23:16:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:47,706 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2020-09-04 23:16:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-09-04 23:16:47,707 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 271 [2020-09-04 23:16:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:47,710 INFO L225 Difference]: With dead ends: 286 [2020-09-04 23:16:47,710 INFO L226 Difference]: Without dead ends: 280 [2020-09-04 23:16:47,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-09-04 23:16:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-04 23:16:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-09-04 23:16:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-09-04 23:16:47,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2020-09-04 23:16:47,719 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 271 [2020-09-04 23:16:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:47,720 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2020-09-04 23:16:47,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-09-04 23:16:47,720 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2020-09-04 23:16:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-09-04 23:16:47,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:47,722 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:47,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-09-04 23:16:47,722 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1731710983, now seen corresponding path program 52 times [2020-09-04 23:16:47,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:47,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034298038] [2020-09-04 23:16:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:56,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 0 proven. 6682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:16:56,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034298038] [2020-09-04 23:16:56,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:56,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2020-09-04 23:16:56,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150746585] [2020-09-04 23:16:56,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-09-04 23:16:56,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:56,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-09-04 23:16:56,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-09-04 23:16:56,783 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 108 states. [2020-09-04 23:17:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:10,727 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2020-09-04 23:17:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-09-04 23:17:10,728 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 276 [2020-09-04 23:17:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:10,730 INFO L225 Difference]: With dead ends: 291 [2020-09-04 23:17:10,730 INFO L226 Difference]: Without dead ends: 285 [2020-09-04 23:17:10,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-09-04 23:17:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-09-04 23:17:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-09-04 23:17:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-09-04 23:17:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 282 transitions. [2020-09-04 23:17:10,737 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 282 transitions. Word has length 276 [2020-09-04 23:17:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:10,738 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 282 transitions. [2020-09-04 23:17:10,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-09-04 23:17:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 282 transitions. [2020-09-04 23:17:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-09-04 23:17:10,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:10,740 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:10,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-09-04 23:17:10,740 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 449165975, now seen corresponding path program 53 times [2020-09-04 23:17:10,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:10,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011298417] [2020-09-04 23:17:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:20,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6943 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:20,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011298417] [2020-09-04 23:17:20,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:20,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2020-09-04 23:17:20,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403265360] [2020-09-04 23:17:20,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-09-04 23:17:20,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:20,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-09-04 23:17:20,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-09-04 23:17:20,543 INFO L87 Difference]: Start difference. First operand 282 states and 282 transitions. Second operand 110 states. [2020-09-04 23:17:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:36,287 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2020-09-04 23:17:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-09-04 23:17:36,289 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 281 [2020-09-04 23:17:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:36,291 INFO L225 Difference]: With dead ends: 296 [2020-09-04 23:17:36,291 INFO L226 Difference]: Without dead ends: 290 [2020-09-04 23:17:36,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-09-04 23:17:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-04 23:17:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2020-09-04 23:17:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-09-04 23:17:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2020-09-04 23:17:36,297 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 281 [2020-09-04 23:17:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:36,297 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2020-09-04 23:17:36,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-09-04 23:17:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2020-09-04 23:17:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-09-04 23:17:36,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:36,299 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:36,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-09-04 23:17:36,299 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:36,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:36,300 INFO L82 PathProgramCache]: Analyzing trace with hash -649321799, now seen corresponding path program 54 times [2020-09-04 23:17:36,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:36,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057488699] [2020-09-04 23:17:36,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:46,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7209 backedges. 0 proven. 7209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:17:47,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057488699] [2020-09-04 23:17:47,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:47,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2020-09-04 23:17:47,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030971893] [2020-09-04 23:17:47,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-09-04 23:17:47,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:47,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-09-04 23:17:47,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-09-04 23:17:47,073 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 112 states. [2020-09-04 23:18:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:03,868 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2020-09-04 23:18:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-09-04 23:18:03,870 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 286 [2020-09-04 23:18:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:03,872 INFO L225 Difference]: With dead ends: 301 [2020-09-04 23:18:03,872 INFO L226 Difference]: Without dead ends: 295 [2020-09-04 23:18:03,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-09-04 23:18:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-09-04 23:18:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2020-09-04 23:18:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-09-04 23:18:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2020-09-04 23:18:03,881 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 286 [2020-09-04 23:18:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:03,882 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2020-09-04 23:18:03,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-09-04 23:18:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2020-09-04 23:18:03,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-09-04 23:18:03,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:03,884 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:03,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-09-04 23:18:03,884 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:03,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash -259293225, now seen corresponding path program 55 times [2020-09-04 23:18:03,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:03,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864553016] [2020-09-04 23:18:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:15,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7480 backedges. 0 proven. 7480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:15,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864553016] [2020-09-04 23:18:15,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:15,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2020-09-04 23:18:15,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743948485] [2020-09-04 23:18:15,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-09-04 23:18:15,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:15,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-09-04 23:18:15,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-09-04 23:18:15,556 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 114 states. [2020-09-04 23:18:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:34,040 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2020-09-04 23:18:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-09-04 23:18:34,042 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 291 [2020-09-04 23:18:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:34,045 INFO L225 Difference]: With dead ends: 306 [2020-09-04 23:18:34,045 INFO L226 Difference]: Without dead ends: 300 [2020-09-04 23:18:34,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-09-04 23:18:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-04 23:18:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2020-09-04 23:18:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-09-04 23:18:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2020-09-04 23:18:34,054 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 291 [2020-09-04 23:18:34,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:34,055 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2020-09-04 23:18:34,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-09-04 23:18:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2020-09-04 23:18:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-09-04 23:18:34,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:34,057 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:34,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-09-04 23:18:34,060 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:34,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1854907769, now seen corresponding path program 56 times [2020-09-04 23:18:34,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:34,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724905677] [2020-09-04 23:18:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:46,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7756 backedges. 0 proven. 7756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:18:46,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724905677] [2020-09-04 23:18:46,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:46,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2020-09-04 23:18:46,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577676527] [2020-09-04 23:18:46,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-09-04 23:18:46,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:46,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-09-04 23:18:46,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-09-04 23:18:46,946 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 116 states. [2020-09-04 23:19:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:07,032 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2020-09-04 23:19:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-09-04 23:19:07,035 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 296 [2020-09-04 23:19:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:07,038 INFO L225 Difference]: With dead ends: 311 [2020-09-04 23:19:07,038 INFO L226 Difference]: Without dead ends: 305 [2020-09-04 23:19:07,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-09-04 23:19:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-09-04 23:19:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-09-04 23:19:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-09-04 23:19:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2020-09-04 23:19:07,046 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 296 [2020-09-04 23:19:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:07,046 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2020-09-04 23:19:07,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-09-04 23:19:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2020-09-04 23:19:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-04 23:19:07,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:07,048 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:07,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-09-04 23:19:07,048 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864151, now seen corresponding path program 57 times [2020-09-04 23:19:07,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:07,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105389486] [2020-09-04 23:19:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:21,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8037 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:21,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105389486] [2020-09-04 23:19:21,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:21,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2020-09-04 23:19:21,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348112649] [2020-09-04 23:19:21,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-09-04 23:19:21,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-09-04 23:19:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-09-04 23:19:21,281 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 118 states. [2020-09-04 23:19:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:43,825 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2020-09-04 23:19:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-09-04 23:19:43,828 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 301 [2020-09-04 23:19:43,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:43,830 INFO L225 Difference]: With dead ends: 316 [2020-09-04 23:19:43,830 INFO L226 Difference]: Without dead ends: 310 [2020-09-04 23:19:43,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-09-04 23:19:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-04 23:19:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-09-04 23:19:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-09-04 23:19:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-09-04 23:19:43,840 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 301 [2020-09-04 23:19:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:43,841 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-09-04 23:19:43,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-09-04 23:19:43,841 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-09-04 23:19:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-09-04 23:19:43,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:43,843 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:43,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-04 23:19:43,844 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1516156985, now seen corresponding path program 58 times [2020-09-04 23:19:43,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:43,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345562462] [2020-09-04 23:19:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:59,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8323 backedges. 0 proven. 8323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:19:59,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345562462] [2020-09-04 23:19:59,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:19:59,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2020-09-04 23:19:59,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831610862] [2020-09-04 23:19:59,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-09-04 23:19:59,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:19:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-09-04 23:19:59,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-09-04 23:19:59,626 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 120 states. [2020-09-04 23:20:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:24,370 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2020-09-04 23:20:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-09-04 23:20:24,372 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 306 [2020-09-04 23:20:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:24,375 INFO L225 Difference]: With dead ends: 321 [2020-09-04 23:20:24,375 INFO L226 Difference]: Without dead ends: 315 [2020-09-04 23:20:24,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-09-04 23:20:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-09-04 23:20:24,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2020-09-04 23:20:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-09-04 23:20:24,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 312 transitions. [2020-09-04 23:20:24,384 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 312 transitions. Word has length 306 [2020-09-04 23:20:24,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:24,384 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 312 transitions. [2020-09-04 23:20:24,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-09-04 23:20:24,385 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 312 transitions. [2020-09-04 23:20:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-09-04 23:20:24,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:24,387 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:24,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-09-04 23:20:24,387 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1731877463, now seen corresponding path program 59 times [2020-09-04 23:20:24,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:24,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114018300] [2020-09-04 23:20:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:41,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8614 backedges. 0 proven. 8614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:20:41,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114018300] [2020-09-04 23:20:41,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:41,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2020-09-04 23:20:41,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057660166] [2020-09-04 23:20:41,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-09-04 23:20:41,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:41,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-09-04 23:20:41,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-09-04 23:20:41,356 INFO L87 Difference]: Start difference. First operand 312 states and 312 transitions. Second operand 122 states. [2020-09-04 23:21:09,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:09,064 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2020-09-04 23:21:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-09-04 23:21:09,068 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 311 [2020-09-04 23:21:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:09,070 INFO L225 Difference]: With dead ends: 326 [2020-09-04 23:21:09,070 INFO L226 Difference]: Without dead ends: 320 [2020-09-04 23:21:09,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=18000, Invalid=39360, Unknown=0, NotChecked=0, Total=57360 [2020-09-04 23:21:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-09-04 23:21:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2020-09-04 23:21:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-09-04 23:21:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2020-09-04 23:21:09,080 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 311 [2020-09-04 23:21:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:09,080 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2020-09-04 23:21:09,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 122 states. [2020-09-04 23:21:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2020-09-04 23:21:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-09-04 23:21:09,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:09,082 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:21:09,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-09-04 23:21:09,083 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:09,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:09,083 INFO L82 PathProgramCache]: Analyzing trace with hash -813344007, now seen corresponding path program 60 times [2020-09-04 23:21:09,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:09,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904731121] [2020-09-04 23:21:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:28,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:21:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:21:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8910 backedges. 0 proven. 8910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:21:28,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904731121] [2020-09-04 23:21:28,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:28,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2020-09-04 23:21:28,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678976447] [2020-09-04 23:21:28,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2020-09-04 23:21:28,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:28,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2020-09-04 23:21:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2020-09-04 23:21:28,135 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 124 states. [2020-09-04 23:21:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:21:58,296 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2020-09-04 23:21:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-09-04 23:21:58,299 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 316 [2020-09-04 23:21:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:21:58,302 INFO L225 Difference]: With dead ends: 331 [2020-09-04 23:21:58,302 INFO L226 Difference]: Without dead ends: 325 [2020-09-04 23:21:58,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10799 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=18605, Invalid=40687, Unknown=0, NotChecked=0, Total=59292 [2020-09-04 23:21:58,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-09-04 23:21:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 322. [2020-09-04 23:21:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-09-04 23:21:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 322 transitions. [2020-09-04 23:21:58,312 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 322 transitions. Word has length 316 [2020-09-04 23:21:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:21:58,313 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 322 transitions. [2020-09-04 23:21:58,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 124 states. [2020-09-04 23:21:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 322 transitions. [2020-09-04 23:21:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-09-04 23:21:58,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:21:58,315 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:21:58,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-09-04 23:21:58,315 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:21:58,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:21:58,316 INFO L82 PathProgramCache]: Analyzing trace with hash -225742953, now seen corresponding path program 61 times [2020-09-04 23:21:58,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:21:58,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911669499] [2020-09-04 23:21:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:21:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:16,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:22:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:22:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9211 backedges. 0 proven. 9211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:22:16,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911669499] [2020-09-04 23:22:16,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:22:16,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126] total 126 [2020-09-04 23:22:16,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112429971] [2020-09-04 23:22:16,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-09-04 23:22:16,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:22:16,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-09-04 23:22:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2020-09-04 23:22:16,927 INFO L87 Difference]: Start difference. First operand 322 states and 322 transitions. Second operand 126 states. [2020-09-04 23:22:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:22:46,170 INFO L93 Difference]: Finished difference Result 336 states and 336 transitions. [2020-09-04 23:22:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2020-09-04 23:22:46,173 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 321 [2020-09-04 23:22:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:22:46,176 INFO L225 Difference]: With dead ends: 336 [2020-09-04 23:22:46,176 INFO L226 Difference]: Without dead ends: 330 [2020-09-04 23:22:46,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11162 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=19220, Invalid=42036, Unknown=0, NotChecked=0, Total=61256 [2020-09-04 23:22:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-09-04 23:22:46,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 327. [2020-09-04 23:22:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-09-04 23:22:46,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2020-09-04 23:22:46,183 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 321 [2020-09-04 23:22:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:22:46,183 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2020-09-04 23:22:46,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-09-04 23:22:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2020-09-04 23:22:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-09-04 23:22:46,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:22:46,186 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:22:46,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-09-04 23:22:46,187 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:22:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:22:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -238056007, now seen corresponding path program 62 times [2020-09-04 23:22:46,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:22:46,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999131575] [2020-09-04 23:22:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:22:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:06,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:23:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:23:06,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999131575] [2020-09-04 23:23:06,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:23:06,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2020-09-04 23:23:06,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385381648] [2020-09-04 23:23:06,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2020-09-04 23:23:06,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:23:06,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2020-09-04 23:23:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2020-09-04 23:23:06,476 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 128 states. [2020-09-04 23:23:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:23:37,577 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2020-09-04 23:23:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2020-09-04 23:23:37,581 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 326 [2020-09-04 23:23:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:23:37,584 INFO L225 Difference]: With dead ends: 341 [2020-09-04 23:23:37,584 INFO L226 Difference]: Without dead ends: 335 [2020-09-04 23:23:37,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11531 ImplicationChecksByTransitivity, 49.1s TimeCoverageRelationStatistics Valid=19845, Invalid=43407, Unknown=0, NotChecked=0, Total=63252 [2020-09-04 23:23:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-09-04 23:23:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2020-09-04 23:23:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-09-04 23:23:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 332 transitions. [2020-09-04 23:23:37,593 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 332 transitions. Word has length 326 [2020-09-04 23:23:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:23:37,594 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 332 transitions. [2020-09-04 23:23:37,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 128 states. [2020-09-04 23:23:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 332 transitions. [2020-09-04 23:23:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-09-04 23:23:37,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:23:37,597 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:23:37,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-09-04 23:23:37,597 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:23:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:23:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1215493335, now seen corresponding path program 63 times [2020-09-04 23:23:37,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:23:37,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029977379] [2020-09-04 23:23:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:23:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:56,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:23:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:23:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9828 backedges. 0 proven. 9828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:23:56,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029977379] [2020-09-04 23:23:56,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:23:56,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2020-09-04 23:23:56,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985109671] [2020-09-04 23:23:56,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2020-09-04 23:23:56,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:23:56,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2020-09-04 23:23:56,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2020-09-04 23:23:56,110 INFO L87 Difference]: Start difference. First operand 332 states and 332 transitions. Second operand 130 states.