/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-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:08:14,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:08:14,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:08:14,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:08:14,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:08:14,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:08:14,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:08:14,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:08:14,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:08:14,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:08:14,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:08:14,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:08:14,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:08:14,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:08:14,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:08:14,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:08:14,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:08:14,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:08:14,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:08:14,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:08:14,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:08:14,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:08:14,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:08:14,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:08:14,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:08:14,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:08:14,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:08:14,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:08:14,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:08:14,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:08:14,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:08:14,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:08:14,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:08:14,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:08:14,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:08:14,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:08:14,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:08:14,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:08:14,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:08:14,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:08:14,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:08:14,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:08:14,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:08:14,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:08:14,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:08:14,606 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:08:14,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:08:14,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:08:14,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:08:14,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:08:14,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:08:14,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:08:14,607 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:08:14,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:08:14,608 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:08:14,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:08:14,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:08:14,609 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:08:14,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:08:14,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:08:14,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:08:14,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:08:14,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:08:14,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:08:14,612 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 18:08:14,942 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:08:14,960 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:08:14,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:08:14,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:08:14,968 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:08:14,969 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-07-17 18:08:15,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/965e0ea17/0cc8211018af409392541d3993b972f3/FLAG7a186f5b4 [2020-07-17 18:08:15,637 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:08:15,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-07-17 18:08:15,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/965e0ea17/0cc8211018af409392541d3993b972f3/FLAG7a186f5b4 [2020-07-17 18:08:15,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/965e0ea17/0cc8211018af409392541d3993b972f3 [2020-07-17 18:08:15,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:08:15,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:08:15,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:08:15,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:08:15,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:08:16,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:08:15" (1/1) ... [2020-07-17 18:08:16,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a4e167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16, skipping insertion in model container [2020-07-17 18:08:16,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:08:15" (1/1) ... [2020-07-17 18:08:16,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:08:16,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:08:16,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:08:16,247 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:08:16,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:08:16,286 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:08:16,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16 WrapperNode [2020-07-17 18:08:16,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:08:16,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:08:16,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:08:16,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:08:16,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16" (1/1) ... [2020-07-17 18:08:16,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16" (1/1) ... [2020-07-17 18:08:16,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16" (1/1) ... [2020-07-17 18:08:16,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16" (1/1) ... [2020-07-17 18:08:16,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16" (1/1) ... [2020-07-17 18:08:16,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16" (1/1) ... [2020-07-17 18:08:16,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16" (1/1) ... [2020-07-17 18:08:16,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:08:16,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:08:16,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:08:16,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:08:16,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:08:16,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:08:16,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:08:16,508 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:08:16,508 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:08:16,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:08:16,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:08:16,509 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:08:16,509 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:08:16,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:08:16,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:08:16,509 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:08:16,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:08:16,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:08:16,805 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:08:16,805 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 18:08:16,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:08:16 BoogieIcfgContainer [2020-07-17 18:08:16,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:08:16,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:08:16,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:08:16,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:08:16,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:08:15" (1/3) ... [2020-07-17 18:08:16,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad3ef4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:08:16, skipping insertion in model container [2020-07-17 18:08:16,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:16" (2/3) ... [2020-07-17 18:08:16,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad3ef4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:08:16, skipping insertion in model container [2020-07-17 18:08:16,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:08:16" (3/3) ... [2020-07-17 18:08:16,826 INFO L109 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2020-07-17 18:08:16,840 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:08:16,852 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:08:16,884 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:08:16,946 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:08:16,947 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:08:16,947 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:08:16,947 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:08:16,947 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:08:16,947 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:08:16,948 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:08:16,948 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:08:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-17 18:08:16,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 18:08:16,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:16,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:16,999 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash -815601615, now seen corresponding path program 1 times [2020-07-17 18:08:17,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:17,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621188278] [2020-07-17 18:08:17,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:17,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621188278] [2020-07-17 18:08:17,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:08:17,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 18:08:17,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306868849] [2020-07-17 18:08:17,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 18:08:17,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:17,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 18:08:17,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 18:08:17,237 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-07-17 18:08:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:17,280 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-07-17 18:08:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 18:08:17,282 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-07-17 18:08:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:17,306 INFO L225 Difference]: With dead ends: 76 [2020-07-17 18:08:17,306 INFO L226 Difference]: Without dead ends: 42 [2020-07-17 18:08:17,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 18:08:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-17 18:08:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-17 18:08:17,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 18:08:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-07-17 18:08:17,430 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-07-17 18:08:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:17,431 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-07-17 18:08:17,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 18:08:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-07-17 18:08:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 18:08:17,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:17,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:17,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:08:17,438 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:17,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2089093357, now seen corresponding path program 1 times [2020-07-17 18:08:17,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:17,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108018882] [2020-07-17 18:08:17,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:17,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108018882] [2020-07-17 18:08:17,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:08:17,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:08:17,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361111787] [2020-07-17 18:08:17,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:08:17,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:17,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:08:17,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:08:17,801 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 5 states. [2020-07-17 18:08:17,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:17,882 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-07-17 18:08:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:08:17,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-17 18:08:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:17,885 INFO L225 Difference]: With dead ends: 51 [2020-07-17 18:08:17,885 INFO L226 Difference]: Without dead ends: 49 [2020-07-17 18:08:17,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:08:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-17 18:08:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-17 18:08:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 18:08:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-07-17 18:08:17,904 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 28 [2020-07-17 18:08:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:17,905 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-07-17 18:08:17,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:08:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-07-17 18:08:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-17 18:08:17,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:17,907 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:17,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:08:17,908 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:17,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:17,909 INFO L82 PathProgramCache]: Analyzing trace with hash -594427423, now seen corresponding path program 1 times [2020-07-17 18:08:17,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:17,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120261236] [2020-07-17 18:08:17,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:18,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120261236] [2020-07-17 18:08:18,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:08:18,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 18:08:18,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297330858] [2020-07-17 18:08:18,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 18:08:18,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:18,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 18:08:18,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:08:18,020 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 6 states. [2020-07-17 18:08:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:18,256 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-07-17 18:08:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:08:18,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-17 18:08:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:18,262 INFO L225 Difference]: With dead ends: 82 [2020-07-17 18:08:18,262 INFO L226 Difference]: Without dead ends: 61 [2020-07-17 18:08:18,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:08:18,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-17 18:08:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-07-17 18:08:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-17 18:08:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-07-17 18:08:18,284 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 38 [2020-07-17 18:08:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:18,285 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-07-17 18:08:18,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 18:08:18,285 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-07-17 18:08:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-17 18:08:18,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:18,288 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:18,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:08:18,289 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:18,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:18,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1151378409, now seen corresponding path program 1 times [2020-07-17 18:08:18,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:18,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705823671] [2020-07-17 18:08:18,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:18,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705823671] [2020-07-17 18:08:18,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:18,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 18:08:18,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456762309] [2020-07-17 18:08:18,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 18:08:18,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 18:08:18,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:08:18,468 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-07-17 18:08:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:18,548 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-07-17 18:08:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 18:08:18,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-07-17 18:08:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:18,551 INFO L225 Difference]: With dead ends: 67 [2020-07-17 18:08:18,551 INFO L226 Difference]: Without dead ends: 65 [2020-07-17 18:08:18,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:08:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-17 18:08:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-07-17 18:08:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 18:08:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-07-17 18:08:18,569 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 44 [2020-07-17 18:08:18,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:18,570 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-07-17 18:08:18,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 18:08:18,570 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-07-17 18:08:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-17 18:08:18,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:18,573 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:18,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 18:08:18,573 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1388174135, now seen corresponding path program 2 times [2020-07-17 18:08:18,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:18,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470182548] [2020-07-17 18:08:18,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 18:08:18,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470182548] [2020-07-17 18:08:18,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:18,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 18:08:18,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404297601] [2020-07-17 18:08:18,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:08:18,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:18,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:08:18,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:08:18,721 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 8 states. [2020-07-17 18:08:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:18,963 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-07-17 18:08:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 18:08:18,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-07-17 18:08:18,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:18,966 INFO L225 Difference]: With dead ends: 112 [2020-07-17 18:08:18,967 INFO L226 Difference]: Without dead ends: 85 [2020-07-17 18:08:18,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:08:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-17 18:08:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2020-07-17 18:08:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-17 18:08:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-07-17 18:08:18,983 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 54 [2020-07-17 18:08:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:18,983 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-07-17 18:08:18,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:08:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-07-17 18:08:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-17 18:08:18,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:18,985 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:18,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 18:08:18,986 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:18,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1511501119, now seen corresponding path program 3 times [2020-07-17 18:08:18,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:18,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225439591] [2020-07-17 18:08:18,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 18:08:19,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225439591] [2020-07-17 18:08:19,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:19,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 18:08:19,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268182857] [2020-07-17 18:08:19,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:08:19,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:19,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:08:19,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:08:19,140 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 9 states. [2020-07-17 18:08:19,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:19,462 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2020-07-17 18:08:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 18:08:19,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-07-17 18:08:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:19,467 INFO L225 Difference]: With dead ends: 126 [2020-07-17 18:08:19,467 INFO L226 Difference]: Without dead ends: 99 [2020-07-17 18:08:19,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:08:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-17 18:08:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-07-17 18:08:19,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-17 18:08:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-07-17 18:08:19,498 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 60 [2020-07-17 18:08:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:19,499 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-07-17 18:08:19,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:08:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-07-17 18:08:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-17 18:08:19,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:19,508 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:19,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 18:08:19,508 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:19,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1048435015, now seen corresponding path program 4 times [2020-07-17 18:08:19,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:19,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684489462] [2020-07-17 18:08:19,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 18:08:19,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684489462] [2020-07-17 18:08:19,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:19,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 18:08:19,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42679713] [2020-07-17 18:08:19,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:08:19,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:08:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:08:19,731 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 8 states. [2020-07-17 18:08:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:19,872 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-07-17 18:08:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 18:08:19,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-07-17 18:08:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:19,875 INFO L225 Difference]: With dead ends: 95 [2020-07-17 18:08:19,877 INFO L226 Difference]: Without dead ends: 93 [2020-07-17 18:08:19,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:08:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-17 18:08:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-07-17 18:08:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-17 18:08:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-07-17 18:08:19,919 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 66 [2020-07-17 18:08:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:19,919 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-07-17 18:08:19,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:08:19,920 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-07-17 18:08:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-17 18:08:19,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:19,927 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:19,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 18:08:19,929 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1426826083, now seen corresponding path program 5 times [2020-07-17 18:08:19,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:19,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524439834] [2020-07-17 18:08:19,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-17 18:08:20,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524439834] [2020-07-17 18:08:20,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:20,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 18:08:20,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952461568] [2020-07-17 18:08:20,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 18:08:20,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:20,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 18:08:20,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:08:20,130 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 12 states. [2020-07-17 18:08:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:20,522 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2020-07-17 18:08:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 18:08:20,523 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-07-17 18:08:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:20,530 INFO L225 Difference]: With dead ends: 168 [2020-07-17 18:08:20,530 INFO L226 Difference]: Without dead ends: 129 [2020-07-17 18:08:20,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-07-17 18:08:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-17 18:08:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2020-07-17 18:08:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-17 18:08:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-07-17 18:08:20,562 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 86 [2020-07-17 18:08:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:20,562 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-07-17 18:08:20,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 18:08:20,563 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-07-17 18:08:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-17 18:08:20,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:20,571 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:20,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 18:08:20,572 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1621404309, now seen corresponding path program 6 times [2020-07-17 18:08:20,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:20,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432165339] [2020-07-17 18:08:20,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 52 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-17 18:08:20,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432165339] [2020-07-17 18:08:20,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:20,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 18:08:20,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439823266] [2020-07-17 18:08:20,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 18:08:20,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:20,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 18:08:20,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:08:20,814 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 13 states. [2020-07-17 18:08:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:21,295 INFO L93 Difference]: Finished difference Result 182 states and 201 transitions. [2020-07-17 18:08:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 18:08:21,296 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 92 [2020-07-17 18:08:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:21,298 INFO L225 Difference]: With dead ends: 182 [2020-07-17 18:08:21,298 INFO L226 Difference]: Without dead ends: 143 [2020-07-17 18:08:21,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2020-07-17 18:08:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-17 18:08:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 100. [2020-07-17 18:08:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-17 18:08:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-07-17 18:08:21,316 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 92 [2020-07-17 18:08:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:21,317 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-07-17 18:08:21,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 18:08:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-07-17 18:08:21,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-17 18:08:21,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:21,319 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:21,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 18:08:21,320 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:21,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1859084659, now seen corresponding path program 7 times [2020-07-17 18:08:21,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:21,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792665521] [2020-07-17 18:08:21,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 78 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-17 18:08:21,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792665521] [2020-07-17 18:08:21,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:21,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 18:08:21,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35486619] [2020-07-17 18:08:21,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 18:08:21,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:21,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 18:08:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:08:21,475 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-07-17 18:08:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:21,592 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-07-17 18:08:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 18:08:21,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 98 [2020-07-17 18:08:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:21,594 INFO L225 Difference]: With dead ends: 123 [2020-07-17 18:08:21,595 INFO L226 Difference]: Without dead ends: 121 [2020-07-17 18:08:21,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:08:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-07-17 18:08:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2020-07-17 18:08:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-17 18:08:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2020-07-17 18:08:21,614 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 98 [2020-07-17 18:08:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:21,614 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2020-07-17 18:08:21,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 18:08:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2020-07-17 18:08:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-17 18:08:21,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:21,617 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:21,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 18:08:21,618 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1617732209, now seen corresponding path program 8 times [2020-07-17 18:08:21,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:21,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609270741] [2020-07-17 18:08:21,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-17 18:08:21,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609270741] [2020-07-17 18:08:21,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:21,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 18:08:21,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506778206] [2020-07-17 18:08:21,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 18:08:21,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:21,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 18:08:21,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:08:21,865 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 15 states. [2020-07-17 18:08:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:22,432 INFO L93 Difference]: Finished difference Result 224 states and 247 transitions. [2020-07-17 18:08:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 18:08:22,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 118 [2020-07-17 18:08:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:22,436 INFO L225 Difference]: With dead ends: 224 [2020-07-17 18:08:22,436 INFO L226 Difference]: Without dead ends: 173 [2020-07-17 18:08:22,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2020-07-17 18:08:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-17 18:08:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 122. [2020-07-17 18:08:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-17 18:08:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2020-07-17 18:08:22,461 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 118 [2020-07-17 18:08:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:22,462 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2020-07-17 18:08:22,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 18:08:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2020-07-17 18:08:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-07-17 18:08:22,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:22,464 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:22,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 18:08:22,465 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:22,466 INFO L82 PathProgramCache]: Analyzing trace with hash -581374057, now seen corresponding path program 9 times [2020-07-17 18:08:22,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:22,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83919015] [2020-07-17 18:08:22,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 114 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-17 18:08:22,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83919015] [2020-07-17 18:08:22,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:22,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 18:08:22,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136015584] [2020-07-17 18:08:22,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 18:08:22,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:22,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 18:08:22,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:08:22,648 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand 11 states. [2020-07-17 18:08:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:22,783 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-07-17 18:08:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 18:08:22,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2020-07-17 18:08:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:22,786 INFO L225 Difference]: With dead ends: 139 [2020-07-17 18:08:22,787 INFO L226 Difference]: Without dead ends: 137 [2020-07-17 18:08:22,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:08:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-17 18:08:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2020-07-17 18:08:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-17 18:08:22,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-07-17 18:08:22,807 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 124 [2020-07-17 18:08:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:22,808 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-07-17 18:08:22,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 18:08:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-07-17 18:08:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-17 18:08:22,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:22,810 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:22,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 18:08:22,811 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:22,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1723472539, now seen corresponding path program 10 times [2020-07-17 18:08:22,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:22,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638399632] [2020-07-17 18:08:22,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 154 proven. 102 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 18:08:23,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638399632] [2020-07-17 18:08:23,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:23,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-17 18:08:23,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027339639] [2020-07-17 18:08:23,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 18:08:23,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 18:08:23,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-07-17 18:08:23,162 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 18 states. [2020-07-17 18:08:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:23,758 INFO L93 Difference]: Finished difference Result 254 states and 280 transitions. [2020-07-17 18:08:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-17 18:08:23,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 134 [2020-07-17 18:08:23,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:23,764 INFO L225 Difference]: With dead ends: 254 [2020-07-17 18:08:23,764 INFO L226 Difference]: Without dead ends: 197 [2020-07-17 18:08:23,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-07-17 18:08:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-07-17 18:08:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 138. [2020-07-17 18:08:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-17 18:08:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-07-17 18:08:23,792 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 134 [2020-07-17 18:08:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:23,793 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-07-17 18:08:23,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 18:08:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-07-17 18:08:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-07-17 18:08:23,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:23,795 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:23,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 18:08:23,796 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash 318138221, now seen corresponding path program 11 times [2020-07-17 18:08:23,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:23,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835748430] [2020-07-17 18:08:23,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 154 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 18:08:24,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835748430] [2020-07-17 18:08:24,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:24,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-17 18:08:24,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600634578] [2020-07-17 18:08:24,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 18:08:24,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:24,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 18:08:24,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-07-17 18:08:24,202 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 19 states. [2020-07-17 18:08:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:25,244 INFO L93 Difference]: Finished difference Result 268 states and 297 transitions. [2020-07-17 18:08:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 18:08:25,245 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 140 [2020-07-17 18:08:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:25,248 INFO L225 Difference]: With dead ends: 268 [2020-07-17 18:08:25,249 INFO L226 Difference]: Without dead ends: 211 [2020-07-17 18:08:25,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 18:08:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-17 18:08:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 144. [2020-07-17 18:08:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-17 18:08:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-07-17 18:08:25,284 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 140 [2020-07-17 18:08:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:25,285 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-07-17 18:08:25,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 18:08:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-07-17 18:08:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-07-17 18:08:25,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:25,289 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:25,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 18:08:25,290 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash 435110773, now seen corresponding path program 12 times [2020-07-17 18:08:25,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:25,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052389733] [2020-07-17 18:08:25,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 198 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-17 18:08:25,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052389733] [2020-07-17 18:08:25,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:25,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 18:08:25,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319557549] [2020-07-17 18:08:25,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 18:08:25,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:25,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 18:08:25,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:08:25,660 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 13 states. [2020-07-17 18:08:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:25,876 INFO L93 Difference]: Finished difference Result 167 states and 173 transitions. [2020-07-17 18:08:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 18:08:25,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 146 [2020-07-17 18:08:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:25,881 INFO L225 Difference]: With dead ends: 167 [2020-07-17 18:08:25,881 INFO L226 Difference]: Without dead ends: 165 [2020-07-17 18:08:25,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-17 18:08:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-17 18:08:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2020-07-17 18:08:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-17 18:08:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2020-07-17 18:08:25,916 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 146 [2020-07-17 18:08:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:25,917 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2020-07-17 18:08:25,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 18:08:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2020-07-17 18:08:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-07-17 18:08:25,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:25,921 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:25,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 18:08:25,921 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:25,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:25,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1491064175, now seen corresponding path program 13 times [2020-07-17 18:08:25,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:25,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71726362] [2020-07-17 18:08:25,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 252 proven. 184 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 18:08:26,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71726362] [2020-07-17 18:08:26,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:26,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-17 18:08:26,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819276340] [2020-07-17 18:08:26,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 18:08:26,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:26,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 18:08:26,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-07-17 18:08:26,447 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand 22 states. [2020-07-17 18:08:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:27,254 INFO L93 Difference]: Finished difference Result 310 states and 343 transitions. [2020-07-17 18:08:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-17 18:08:27,257 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 166 [2020-07-17 18:08:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:27,262 INFO L225 Difference]: With dead ends: 310 [2020-07-17 18:08:27,262 INFO L226 Difference]: Without dead ends: 241 [2020-07-17 18:08:27,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 18:08:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-07-17 18:08:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 166. [2020-07-17 18:08:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-17 18:08:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2020-07-17 18:08:27,294 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 166 [2020-07-17 18:08:27,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:27,295 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2020-07-17 18:08:27,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 18:08:27,295 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2020-07-17 18:08:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-07-17 18:08:27,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:27,297 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:27,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 18:08:27,298 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:27,299 INFO L82 PathProgramCache]: Analyzing trace with hash -586773351, now seen corresponding path program 14 times [2020-07-17 18:08:27,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:27,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402154750] [2020-07-17 18:08:27,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 252 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 18:08:27,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402154750] [2020-07-17 18:08:27,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:27,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-17 18:08:27,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035665909] [2020-07-17 18:08:27,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 18:08:27,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:27,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 18:08:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-07-17 18:08:27,815 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 23 states. [2020-07-17 18:08:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:28,899 INFO L93 Difference]: Finished difference Result 324 states and 360 transitions. [2020-07-17 18:08:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 18:08:28,900 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 172 [2020-07-17 18:08:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:28,909 INFO L225 Difference]: With dead ends: 324 [2020-07-17 18:08:28,909 INFO L226 Difference]: Without dead ends: 255 [2020-07-17 18:08:28,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2020-07-17 18:08:28,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-17 18:08:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 172. [2020-07-17 18:08:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-17 18:08:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2020-07-17 18:08:28,936 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 172 [2020-07-17 18:08:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:28,937 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2020-07-17 18:08:28,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 18:08:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2020-07-17 18:08:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-07-17 18:08:28,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:28,940 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:28,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 18:08:28,941 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:28,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:28,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1481459873, now seen corresponding path program 15 times [2020-07-17 18:08:28,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:28,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247081510] [2020-07-17 18:08:28,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 308 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-07-17 18:08:29,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247081510] [2020-07-17 18:08:29,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:29,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 18:08:29,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409509596] [2020-07-17 18:08:29,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 18:08:29,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:29,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 18:08:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:08:29,313 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand 15 states. [2020-07-17 18:08:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:29,490 INFO L93 Difference]: Finished difference Result 195 states and 202 transitions. [2020-07-17 18:08:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 18:08:29,491 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 178 [2020-07-17 18:08:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:29,493 INFO L225 Difference]: With dead ends: 195 [2020-07-17 18:08:29,494 INFO L226 Difference]: Without dead ends: 193 [2020-07-17 18:08:29,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-17 18:08:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-07-17 18:08:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2020-07-17 18:08:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-17 18:08:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 195 transitions. [2020-07-17 18:08:29,515 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 195 transitions. Word has length 178 [2020-07-17 18:08:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:29,516 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 195 transitions. [2020-07-17 18:08:29,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 18:08:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 195 transitions. [2020-07-17 18:08:29,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-07-17 18:08:29,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:29,522 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:29,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 18:08:29,523 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:29,524 INFO L82 PathProgramCache]: Analyzing trace with hash 831775165, now seen corresponding path program 16 times [2020-07-17 18:08:29,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:29,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355535426] [2020-07-17 18:08:29,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 374 proven. 290 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 18:08:30,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355535426] [2020-07-17 18:08:30,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:30,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-17 18:08:30,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397044628] [2020-07-17 18:08:30,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 18:08:30,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:30,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 18:08:30,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-07-17 18:08:30,062 INFO L87 Difference]: Start difference. First operand 188 states and 195 transitions. Second operand 26 states. [2020-07-17 18:08:31,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:31,268 INFO L93 Difference]: Finished difference Result 366 states and 406 transitions. [2020-07-17 18:08:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-17 18:08:31,271 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 198 [2020-07-17 18:08:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:31,274 INFO L225 Difference]: With dead ends: 366 [2020-07-17 18:08:31,275 INFO L226 Difference]: Without dead ends: 285 [2020-07-17 18:08:31,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 18:08:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-17 18:08:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 194. [2020-07-17 18:08:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-17 18:08:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 201 transitions. [2020-07-17 18:08:31,315 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 201 transitions. Word has length 198 [2020-07-17 18:08:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:31,316 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 201 transitions. [2020-07-17 18:08:31,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 18:08:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 201 transitions. [2020-07-17 18:08:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-17 18:08:31,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:31,320 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:31,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 18:08:31,320 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:31,321 INFO L82 PathProgramCache]: Analyzing trace with hash -735042619, now seen corresponding path program 17 times [2020-07-17 18:08:31,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:31,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438448880] [2020-07-17 18:08:31,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 374 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 18:08:31,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438448880] [2020-07-17 18:08:31,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:31,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-17 18:08:31,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347338136] [2020-07-17 18:08:31,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-17 18:08:31,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:31,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-17 18:08:31,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-07-17 18:08:31,846 INFO L87 Difference]: Start difference. First operand 194 states and 201 transitions. Second operand 27 states. [2020-07-17 18:08:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:33,161 INFO L93 Difference]: Finished difference Result 380 states and 423 transitions. [2020-07-17 18:08:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-17 18:08:33,161 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 204 [2020-07-17 18:08:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:33,167 INFO L225 Difference]: With dead ends: 380 [2020-07-17 18:08:33,168 INFO L226 Difference]: Without dead ends: 299 [2020-07-17 18:08:33,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=831, Invalid=1719, Unknown=0, NotChecked=0, Total=2550 [2020-07-17 18:08:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-07-17 18:08:33,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 200. [2020-07-17 18:08:33,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-17 18:08:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2020-07-17 18:08:33,213 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 204 [2020-07-17 18:08:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:33,214 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2020-07-17 18:08:33,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-17 18:08:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2020-07-17 18:08:33,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-07-17 18:08:33,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:33,219 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:33,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 18:08:33,220 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:33,220 INFO L82 PathProgramCache]: Analyzing trace with hash 340049869, now seen corresponding path program 18 times [2020-07-17 18:08:33,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:33,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136354290] [2020-07-17 18:08:33,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 442 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-07-17 18:08:33,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136354290] [2020-07-17 18:08:33,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:33,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 18:08:33,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530307629] [2020-07-17 18:08:33,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 18:08:33,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:33,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 18:08:33,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-07-17 18:08:33,608 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 17 states. [2020-07-17 18:08:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:33,826 INFO L93 Difference]: Finished difference Result 223 states and 231 transitions. [2020-07-17 18:08:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 18:08:33,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 210 [2020-07-17 18:08:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:33,831 INFO L225 Difference]: With dead ends: 223 [2020-07-17 18:08:33,832 INFO L226 Difference]: Without dead ends: 221 [2020-07-17 18:08:33,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-07-17 18:08:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-17 18:08:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 216. [2020-07-17 18:08:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-17 18:08:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2020-07-17 18:08:33,858 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 210 [2020-07-17 18:08:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:33,858 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2020-07-17 18:08:33,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 18:08:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2020-07-17 18:08:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-07-17 18:08:33,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:33,862 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:33,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 18:08:33,863 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:33,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:33,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1871443223, now seen corresponding path program 19 times [2020-07-17 18:08:33,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:33,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099479564] [2020-07-17 18:08:33,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 518 proven. 420 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2020-07-17 18:08:34,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099479564] [2020-07-17 18:08:34,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:34,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-17 18:08:34,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983793301] [2020-07-17 18:08:34,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-17 18:08:34,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:34,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-17 18:08:34,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-07-17 18:08:34,498 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand 29 states. [2020-07-17 18:08:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:35,967 INFO L93 Difference]: Finished difference Result 422 states and 469 transitions. [2020-07-17 18:08:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-17 18:08:35,967 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 230 [2020-07-17 18:08:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:35,971 INFO L225 Difference]: With dead ends: 422 [2020-07-17 18:08:35,972 INFO L226 Difference]: Without dead ends: 329 [2020-07-17 18:08:35,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=965, Invalid=2005, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 18:08:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-07-17 18:08:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 222. [2020-07-17 18:08:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-17 18:08:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 230 transitions. [2020-07-17 18:08:36,003 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 230 transitions. Word has length 230 [2020-07-17 18:08:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:36,004 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 230 transitions. [2020-07-17 18:08:36,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-17 18:08:36,004 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 230 transitions. [2020-07-17 18:08:36,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-07-17 18:08:36,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:36,009 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:36,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 18:08:36,010 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1346776305, now seen corresponding path program 20 times [2020-07-17 18:08:36,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:36,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626950068] [2020-07-17 18:08:36,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 520 proven. 494 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-17 18:08:36,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626950068] [2020-07-17 18:08:36,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:36,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-17 18:08:36,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683473820] [2020-07-17 18:08:36,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 18:08:36,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:36,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 18:08:36,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-07-17 18:08:36,415 INFO L87 Difference]: Start difference. First operand 222 states and 230 transitions. Second operand 18 states. [2020-07-17 18:08:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:36,597 INFO L93 Difference]: Finished difference Result 239 states and 247 transitions. [2020-07-17 18:08:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 18:08:36,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 236 [2020-07-17 18:08:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:36,601 INFO L225 Difference]: With dead ends: 239 [2020-07-17 18:08:36,601 INFO L226 Difference]: Without dead ends: 237 [2020-07-17 18:08:36,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-07-17 18:08:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-17 18:08:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 232. [2020-07-17 18:08:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-17 18:08:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2020-07-17 18:08:36,624 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 236 [2020-07-17 18:08:36,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:36,625 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2020-07-17 18:08:36,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 18:08:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2020-07-17 18:08:36,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-17 18:08:36,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:36,630 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:36,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 18:08:36,630 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash -554583489, now seen corresponding path program 21 times [2020-07-17 18:08:36,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:36,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400389030] [2020-07-17 18:08:36,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 602 proven. 494 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-17 18:08:37,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400389030] [2020-07-17 18:08:37,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:37,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-07-17 18:08:37,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963073364] [2020-07-17 18:08:37,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-17 18:08:37,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:37,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-17 18:08:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-07-17 18:08:37,377 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand 32 states. [2020-07-17 18:08:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:38,939 INFO L93 Difference]: Finished difference Result 452 states and 502 transitions. [2020-07-17 18:08:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-17 18:08:38,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 246 [2020-07-17 18:08:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:38,942 INFO L225 Difference]: With dead ends: 452 [2020-07-17 18:08:38,942 INFO L226 Difference]: Without dead ends: 353 [2020-07-17 18:08:38,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 18:08:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-07-17 18:08:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 238. [2020-07-17 18:08:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-07-17 18:08:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 246 transitions. [2020-07-17 18:08:38,972 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 246 transitions. Word has length 246 [2020-07-17 18:08:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:38,972 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 246 transitions. [2020-07-17 18:08:38,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-17 18:08:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 246 transitions. [2020-07-17 18:08:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-07-17 18:08:38,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:38,977 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:38,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 18:08:38,977 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:38,977 INFO L82 PathProgramCache]: Analyzing trace with hash -812725177, now seen corresponding path program 22 times [2020-07-17 18:08:38,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:38,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014363068] [2020-07-17 18:08:38,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 602 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-17 18:08:39,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014363068] [2020-07-17 18:08:39,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:39,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-07-17 18:08:39,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354217058] [2020-07-17 18:08:39,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-17 18:08:39,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:39,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-17 18:08:39,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-07-17 18:08:39,687 INFO L87 Difference]: Start difference. First operand 238 states and 246 transitions. Second operand 33 states. [2020-07-17 18:08:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:41,737 INFO L93 Difference]: Finished difference Result 466 states and 519 transitions. [2020-07-17 18:08:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-17 18:08:41,738 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 252 [2020-07-17 18:08:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:41,744 INFO L225 Difference]: With dead ends: 466 [2020-07-17 18:08:41,745 INFO L226 Difference]: Without dead ends: 367 [2020-07-17 18:08:41,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1263, Invalid=2643, Unknown=0, NotChecked=0, Total=3906 [2020-07-17 18:08:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-07-17 18:08:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 244. [2020-07-17 18:08:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-07-17 18:08:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 252 transitions. [2020-07-17 18:08:41,787 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 252 transitions. Word has length 252 [2020-07-17 18:08:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:41,788 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 252 transitions. [2020-07-17 18:08:41,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-17 18:08:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 252 transitions. [2020-07-17 18:08:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-07-17 18:08:41,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:41,792 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:41,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 18:08:41,793 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -305645489, now seen corresponding path program 23 times [2020-07-17 18:08:41,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:41,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148660955] [2020-07-17 18:08:41,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1626 backedges. 688 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-17 18:08:42,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148660955] [2020-07-17 18:08:42,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:42,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-17 18:08:42,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992065799] [2020-07-17 18:08:42,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 18:08:42,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:42,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 18:08:42,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-07-17 18:08:42,313 INFO L87 Difference]: Start difference. First operand 244 states and 252 transitions. Second operand 20 states. [2020-07-17 18:08:42,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:42,643 INFO L93 Difference]: Finished difference Result 267 states and 276 transitions. [2020-07-17 18:08:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 18:08:42,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 258 [2020-07-17 18:08:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:42,647 INFO L225 Difference]: With dead ends: 267 [2020-07-17 18:08:42,648 INFO L226 Difference]: Without dead ends: 265 [2020-07-17 18:08:42,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-07-17 18:08:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-17 18:08:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2020-07-17 18:08:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-17 18:08:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 269 transitions. [2020-07-17 18:08:42,689 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 269 transitions. Word has length 258 [2020-07-17 18:08:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:42,690 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 269 transitions. [2020-07-17 18:08:42,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 18:08:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 269 transitions. [2020-07-17 18:08:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-07-17 18:08:42,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:42,694 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:42,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 18:08:42,695 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:42,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1556599189, now seen corresponding path program 24 times [2020-07-17 18:08:42,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:42,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724235650] [2020-07-17 18:08:42,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 784 proven. 660 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-07-17 18:08:43,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724235650] [2020-07-17 18:08:43,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:43,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-07-17 18:08:43,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731514354] [2020-07-17 18:08:43,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-17 18:08:43,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-17 18:08:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 18:08:43,764 INFO L87 Difference]: Start difference. First operand 260 states and 269 transitions. Second operand 36 states. [2020-07-17 18:08:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:45,666 INFO L93 Difference]: Finished difference Result 508 states and 565 transitions. [2020-07-17 18:08:45,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-17 18:08:45,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 278 [2020-07-17 18:08:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:45,669 INFO L225 Difference]: With dead ends: 508 [2020-07-17 18:08:45,669 INFO L226 Difference]: Without dead ends: 397 [2020-07-17 18:08:45,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-07-17 18:08:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-07-17 18:08:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 266. [2020-07-17 18:08:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-07-17 18:08:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 275 transitions. [2020-07-17 18:08:45,702 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 275 transitions. Word has length 278 [2020-07-17 18:08:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:45,703 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 275 transitions. [2020-07-17 18:08:45,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-17 18:08:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 275 transitions. [2020-07-17 18:08:45,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-17 18:08:45,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:45,706 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:45,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-17 18:08:45,707 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:45,707 INFO L82 PathProgramCache]: Analyzing trace with hash -104128397, now seen corresponding path program 25 times [2020-07-17 18:08:45,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:45,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594461047] [2020-07-17 18:08:45,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 784 proven. 752 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-07-17 18:08:46,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594461047] [2020-07-17 18:08:46,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:46,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-07-17 18:08:46,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337524481] [2020-07-17 18:08:46,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-17 18:08:46,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-17 18:08:46,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-07-17 18:08:46,997 INFO L87 Difference]: Start difference. First operand 266 states and 275 transitions. Second operand 37 states. [2020-07-17 18:08:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:49,035 INFO L93 Difference]: Finished difference Result 522 states and 582 transitions. [2020-07-17 18:08:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-17 18:08:49,035 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 284 [2020-07-17 18:08:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:49,039 INFO L225 Difference]: With dead ends: 522 [2020-07-17 18:08:49,039 INFO L226 Difference]: Without dead ends: 411 [2020-07-17 18:08:49,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1601, Invalid=3369, Unknown=0, NotChecked=0, Total=4970 [2020-07-17 18:08:49,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-07-17 18:08:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 272. [2020-07-17 18:08:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-07-17 18:08:49,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 281 transitions. [2020-07-17 18:08:49,091 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 281 transitions. Word has length 284 [2020-07-17 18:08:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:49,092 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 281 transitions. [2020-07-17 18:08:49,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-17 18:08:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 281 transitions. [2020-07-17 18:08:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-07-17 18:08:49,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:49,099 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:49,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-17 18:08:49,100 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:49,100 INFO L82 PathProgramCache]: Analyzing trace with hash -435000197, now seen corresponding path program 26 times [2020-07-17 18:08:49,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:49,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863688606] [2020-07-17 18:08:49,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2114 backedges. 882 proven. 752 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-07-17 18:08:49,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863688606] [2020-07-17 18:08:49,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:49,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-17 18:08:49,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791652085] [2020-07-17 18:08:49,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 18:08:49,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:49,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 18:08:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-07-17 18:08:49,726 INFO L87 Difference]: Start difference. First operand 272 states and 281 transitions. Second operand 22 states. [2020-07-17 18:08:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:50,033 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-07-17 18:08:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-17 18:08:50,034 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 290 [2020-07-17 18:08:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:50,036 INFO L225 Difference]: With dead ends: 295 [2020-07-17 18:08:50,037 INFO L226 Difference]: Without dead ends: 293 [2020-07-17 18:08:50,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-07-17 18:08:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-07-17 18:08:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 288. [2020-07-17 18:08:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-07-17 18:08:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 298 transitions. [2020-07-17 18:08:50,069 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 298 transitions. Word has length 290 [2020-07-17 18:08:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:50,070 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 298 transitions. [2020-07-17 18:08:50,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 18:08:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 298 transitions. [2020-07-17 18:08:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-07-17 18:08:50,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:50,073 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:50,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-17 18:08:50,074 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:50,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:50,074 INFO L82 PathProgramCache]: Analyzing trace with hash -827681641, now seen corresponding path program 27 times [2020-07-17 18:08:50,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:50,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859452830] [2020-07-17 18:08:50,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2452 backedges. 990 proven. 850 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-17 18:08:51,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859452830] [2020-07-17 18:08:51,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:51,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-07-17 18:08:51,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181109004] [2020-07-17 18:08:51,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-17 18:08:51,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:51,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-17 18:08:51,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 18:08:51,229 INFO L87 Difference]: Start difference. First operand 288 states and 298 transitions. Second operand 40 states. [2020-07-17 18:08:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:53,524 INFO L93 Difference]: Finished difference Result 564 states and 628 transitions. [2020-07-17 18:08:53,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-07-17 18:08:53,525 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 310 [2020-07-17 18:08:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:53,529 INFO L225 Difference]: With dead ends: 564 [2020-07-17 18:08:53,529 INFO L226 Difference]: Without dead ends: 441 [2020-07-17 18:08:53,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-07-17 18:08:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-07-17 18:08:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 294. [2020-07-17 18:08:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-17 18:08:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 304 transitions. [2020-07-17 18:08:53,570 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 304 transitions. Word has length 310 [2020-07-17 18:08:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:53,570 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 304 transitions. [2020-07-17 18:08:53,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-17 18:08:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 304 transitions. [2020-07-17 18:08:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-07-17 18:08:53,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:53,574 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:53,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-17 18:08:53,575 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1001612959, now seen corresponding path program 28 times [2020-07-17 18:08:53,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:53,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976288174] [2020-07-17 18:08:53,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 990 proven. 954 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-17 18:08:54,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976288174] [2020-07-17 18:08:54,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:54,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-07-17 18:08:54,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310185107] [2020-07-17 18:08:54,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-17 18:08:54,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:54,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-17 18:08:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-07-17 18:08:54,696 INFO L87 Difference]: Start difference. First operand 294 states and 304 transitions. Second operand 41 states. [2020-07-17 18:08:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:57,164 INFO L93 Difference]: Finished difference Result 578 states and 645 transitions. [2020-07-17 18:08:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-07-17 18:08:57,164 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 316 [2020-07-17 18:08:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:57,168 INFO L225 Difference]: With dead ends: 578 [2020-07-17 18:08:57,168 INFO L226 Difference]: Without dead ends: 455 [2020-07-17 18:08:57,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1979, Invalid=4183, Unknown=0, NotChecked=0, Total=6162 [2020-07-17 18:08:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-07-17 18:08:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 300. [2020-07-17 18:08:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-07-17 18:08:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 310 transitions. [2020-07-17 18:08:57,214 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 310 transitions. Word has length 316 [2020-07-17 18:08:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:57,214 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 310 transitions. [2020-07-17 18:08:57,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-17 18:08:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 310 transitions. [2020-07-17 18:08:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-17 18:08:57,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:57,218 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:57,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-17 18:08:57,219 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1183355559, now seen corresponding path program 29 times [2020-07-17 18:08:57,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:57,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578886682] [2020-07-17 18:08:57,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2666 backedges. 1100 proven. 954 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-07-17 18:08:57,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578886682] [2020-07-17 18:08:57,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:57,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-17 18:08:57,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173470888] [2020-07-17 18:08:57,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-17 18:08:57,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-17 18:08:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-07-17 18:08:57,953 INFO L87 Difference]: Start difference. First operand 300 states and 310 transitions. Second operand 24 states. [2020-07-17 18:08:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:58,282 INFO L93 Difference]: Finished difference Result 323 states and 334 transitions. [2020-07-17 18:08:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 18:08:58,283 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 322 [2020-07-17 18:08:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:58,286 INFO L225 Difference]: With dead ends: 323 [2020-07-17 18:08:58,286 INFO L226 Difference]: Without dead ends: 321 [2020-07-17 18:08:58,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-07-17 18:08:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-07-17 18:08:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-07-17 18:08:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-07-17 18:08:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 327 transitions. [2020-07-17 18:08:58,328 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 327 transitions. Word has length 322 [2020-07-17 18:08:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:58,329 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 327 transitions. [2020-07-17 18:08:58,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-17 18:08:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 327 transitions. [2020-07-17 18:08:58,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-17 18:08:58,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:58,333 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:58,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-17 18:08:58,333 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:58,334 INFO L82 PathProgramCache]: Analyzing trace with hash 920382659, now seen corresponding path program 30 times [2020-07-17 18:08:58,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:58,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939208056] [2020-07-17 18:08:58,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 1220 proven. 1064 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-07-17 18:08:59,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939208056] [2020-07-17 18:08:59,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:59,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-07-17 18:08:59,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007994819] [2020-07-17 18:08:59,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-17 18:08:59,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:59,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-17 18:08:59,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 18:08:59,864 INFO L87 Difference]: Start difference. First operand 316 states and 327 transitions. Second operand 44 states. [2020-07-17 18:09:02,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:02,616 INFO L93 Difference]: Finished difference Result 620 states and 691 transitions. [2020-07-17 18:09:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-07-17 18:09:02,617 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 342 [2020-07-17 18:09:02,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:02,620 INFO L225 Difference]: With dead ends: 620 [2020-07-17 18:09:02,620 INFO L226 Difference]: Without dead ends: 485 [2020-07-17 18:09:02,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-07-17 18:09:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-07-17 18:09:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 322. [2020-07-17 18:09:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-07-17 18:09:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 333 transitions. [2020-07-17 18:09:02,669 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 333 transitions. Word has length 342 [2020-07-17 18:09:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:02,670 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 333 transitions. [2020-07-17 18:09:02,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-17 18:09:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 333 transitions. [2020-07-17 18:09:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-17 18:09:02,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:02,674 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:02,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-17 18:09:02,674 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1792712395, now seen corresponding path program 31 times [2020-07-17 18:09:02,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:02,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121901414] [2020-07-17 18:09:02,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 1220 proven. 1180 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-07-17 18:09:04,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121901414] [2020-07-17 18:09:04,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:04,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-07-17 18:09:04,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666342945] [2020-07-17 18:09:04,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-17 18:09:04,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:04,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-17 18:09:04,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-07-17 18:09:04,147 INFO L87 Difference]: Start difference. First operand 322 states and 333 transitions. Second operand 45 states. [2020-07-17 18:09:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:07,212 INFO L93 Difference]: Finished difference Result 634 states and 708 transitions. [2020-07-17 18:09:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-17 18:09:07,212 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 348 [2020-07-17 18:09:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:07,217 INFO L225 Difference]: With dead ends: 634 [2020-07-17 18:09:07,217 INFO L226 Difference]: Without dead ends: 499 [2020-07-17 18:09:07,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2397, Invalid=5085, Unknown=0, NotChecked=0, Total=7482 [2020-07-17 18:09:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-07-17 18:09:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 328. [2020-07-17 18:09:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-07-17 18:09:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 339 transitions. [2020-07-17 18:09:07,288 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 339 transitions. Word has length 348 [2020-07-17 18:09:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:07,288 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 339 transitions. [2020-07-17 18:09:07,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-17 18:09:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 339 transitions. [2020-07-17 18:09:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-17 18:09:07,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:07,295 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:07,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-17 18:09:07,295 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:07,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:07,296 INFO L82 PathProgramCache]: Analyzing trace with hash -457332013, now seen corresponding path program 32 times [2020-07-17 18:09:07,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:07,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183494648] [2020-07-17 18:09:07,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 1342 proven. 1180 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-07-17 18:09:08,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183494648] [2020-07-17 18:09:08,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:08,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-17 18:09:08,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127855661] [2020-07-17 18:09:08,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 18:09:08,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:08,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 18:09:08,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-07-17 18:09:08,253 INFO L87 Difference]: Start difference. First operand 328 states and 339 transitions. Second operand 26 states. [2020-07-17 18:09:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:08,657 INFO L93 Difference]: Finished difference Result 351 states and 363 transitions. [2020-07-17 18:09:08,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-17 18:09:08,658 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 354 [2020-07-17 18:09:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:08,661 INFO L225 Difference]: With dead ends: 351 [2020-07-17 18:09:08,661 INFO L226 Difference]: Without dead ends: 349 [2020-07-17 18:09:08,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-07-17 18:09:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-07-17 18:09:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 344. [2020-07-17 18:09:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-07-17 18:09:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 356 transitions. [2020-07-17 18:09:08,696 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 356 transitions. Word has length 354 [2020-07-17 18:09:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:08,697 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 356 transitions. [2020-07-17 18:09:08,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 18:09:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 356 transitions. [2020-07-17 18:09:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-07-17 18:09:08,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:08,701 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:08,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-17 18:09:08,702 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:08,702 INFO L82 PathProgramCache]: Analyzing trace with hash 702494447, now seen corresponding path program 33 times [2020-07-17 18:09:08,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:08,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689010865] [2020-07-17 18:09:08,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1474 proven. 1302 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-07-17 18:09:10,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689010865] [2020-07-17 18:09:10,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:10,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-07-17 18:09:10,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545850007] [2020-07-17 18:09:10,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-17 18:09:10,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-17 18:09:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 18:09:10,269 INFO L87 Difference]: Start difference. First operand 344 states and 356 transitions. Second operand 48 states. [2020-07-17 18:09:13,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:13,752 INFO L93 Difference]: Finished difference Result 676 states and 754 transitions. [2020-07-17 18:09:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-07-17 18:09:13,753 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 374 [2020-07-17 18:09:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:13,756 INFO L225 Difference]: With dead ends: 676 [2020-07-17 18:09:13,756 INFO L226 Difference]: Without dead ends: 529 [2020-07-17 18:09:13,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-07-17 18:09:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-07-17 18:09:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 350. [2020-07-17 18:09:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-07-17 18:09:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 362 transitions. [2020-07-17 18:09:13,790 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 362 transitions. Word has length 374 [2020-07-17 18:09:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:13,791 INFO L479 AbstractCegarLoop]: Abstraction has 350 states and 362 transitions. [2020-07-17 18:09:13,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-17 18:09:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 362 transitions. [2020-07-17 18:09:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-07-17 18:09:13,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:13,795 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:13,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-17 18:09:13,796 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:13,796 INFO L82 PathProgramCache]: Analyzing trace with hash -715929353, now seen corresponding path program 34 times [2020-07-17 18:09:13,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:13,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225910177] [2020-07-17 18:09:13,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 1474 proven. 1430 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-07-17 18:09:15,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225910177] [2020-07-17 18:09:15,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:15,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-07-17 18:09:15,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257848778] [2020-07-17 18:09:15,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-17 18:09:15,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-17 18:09:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-07-17 18:09:15,609 INFO L87 Difference]: Start difference. First operand 350 states and 362 transitions. Second operand 49 states. [2020-07-17 18:09:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:19,480 INFO L93 Difference]: Finished difference Result 690 states and 771 transitions. [2020-07-17 18:09:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-17 18:09:19,480 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 380 [2020-07-17 18:09:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:19,486 INFO L225 Difference]: With dead ends: 690 [2020-07-17 18:09:19,487 INFO L226 Difference]: Without dead ends: 543 [2020-07-17 18:09:19,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2855, Invalid=6075, Unknown=0, NotChecked=0, Total=8930 [2020-07-17 18:09:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-07-17 18:09:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 356. [2020-07-17 18:09:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-07-17 18:09:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 368 transitions. [2020-07-17 18:09:19,548 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 368 transitions. Word has length 380 [2020-07-17 18:09:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:19,548 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 368 transitions. [2020-07-17 18:09:19,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-17 18:09:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 368 transitions. [2020-07-17 18:09:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-07-17 18:09:19,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:19,553 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:19,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-17 18:09:19,555 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash 247772415, now seen corresponding path program 35 times [2020-07-17 18:09:19,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:19,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218472686] [2020-07-17 18:09:19,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3962 backedges. 1608 proven. 1430 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-07-17 18:09:20,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218472686] [2020-07-17 18:09:20,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:20,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-17 18:09:20,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724494179] [2020-07-17 18:09:20,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-17 18:09:20,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-17 18:09:20,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-07-17 18:09:20,498 INFO L87 Difference]: Start difference. First operand 356 states and 368 transitions. Second operand 28 states. [2020-07-17 18:09:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:20,965 INFO L93 Difference]: Finished difference Result 379 states and 392 transitions. [2020-07-17 18:09:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-17 18:09:20,966 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 386 [2020-07-17 18:09:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:20,970 INFO L225 Difference]: With dead ends: 379 [2020-07-17 18:09:20,970 INFO L226 Difference]: Without dead ends: 377 [2020-07-17 18:09:20,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-07-17 18:09:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-07-17 18:09:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 372. [2020-07-17 18:09:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-07-17 18:09:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 385 transitions. [2020-07-17 18:09:21,043 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 385 transitions. Word has length 386 [2020-07-17 18:09:21,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:21,044 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 385 transitions. [2020-07-17 18:09:21,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-17 18:09:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 385 transitions. [2020-07-17 18:09:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-07-17 18:09:21,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:21,050 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:21,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-17 18:09:21,051 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:21,052 INFO L82 PathProgramCache]: Analyzing trace with hash 776434459, now seen corresponding path program 36 times [2020-07-17 18:09:21,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:21,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320029583] [2020-07-17 18:09:21,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4420 backedges. 1752 proven. 1564 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-07-17 18:09:23,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320029583] [2020-07-17 18:09:23,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:23,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-07-17 18:09:23,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673893308] [2020-07-17 18:09:23,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-17 18:09:23,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-17 18:09:23,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 18:09:23,266 INFO L87 Difference]: Start difference. First operand 372 states and 385 transitions. Second operand 52 states. [2020-07-17 18:09:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:27,120 INFO L93 Difference]: Finished difference Result 732 states and 817 transitions. [2020-07-17 18:09:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-07-17 18:09:27,121 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 406 [2020-07-17 18:09:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:27,124 INFO L225 Difference]: With dead ends: 732 [2020-07-17 18:09:27,124 INFO L226 Difference]: Without dead ends: 573 [2020-07-17 18:09:27,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-07-17 18:09:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-07-17 18:09:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 378. [2020-07-17 18:09:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-07-17 18:09:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 391 transitions. [2020-07-17 18:09:27,181 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 391 transitions. Word has length 406 [2020-07-17 18:09:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:27,181 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 391 transitions. [2020-07-17 18:09:27,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-17 18:09:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 391 transitions. [2020-07-17 18:09:27,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2020-07-17 18:09:27,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:27,184 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:27,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-17 18:09:27,185 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash 28435747, now seen corresponding path program 37 times [2020-07-17 18:09:27,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:27,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954145875] [2020-07-17 18:09:27,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 1752 proven. 1704 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-07-17 18:09:29,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954145875] [2020-07-17 18:09:29,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:29,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-07-17 18:09:29,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905790776] [2020-07-17 18:09:29,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-17 18:09:29,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:29,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-17 18:09:29,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-07-17 18:09:29,342 INFO L87 Difference]: Start difference. First operand 378 states and 391 transitions. Second operand 53 states. [2020-07-17 18:09:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:34,212 INFO L93 Difference]: Finished difference Result 746 states and 834 transitions. [2020-07-17 18:09:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-07-17 18:09:34,212 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 412 [2020-07-17 18:09:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:34,217 INFO L225 Difference]: With dead ends: 746 [2020-07-17 18:09:34,218 INFO L226 Difference]: Without dead ends: 587 [2020-07-17 18:09:34,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3353, Invalid=7153, Unknown=0, NotChecked=0, Total=10506 [2020-07-17 18:09:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-07-17 18:09:34,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 384. [2020-07-17 18:09:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-07-17 18:09:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 397 transitions. [2020-07-17 18:09:34,286 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 397 transitions. Word has length 412 [2020-07-17 18:09:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:34,287 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 397 transitions. [2020-07-17 18:09:34,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-17 18:09:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 397 transitions. [2020-07-17 18:09:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-17 18:09:34,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:34,292 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:34,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-17 18:09:34,293 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:34,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1261482283, now seen corresponding path program 38 times [2020-07-17 18:09:34,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:34,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104849726] [2020-07-17 18:09:34,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4706 backedges. 1898 proven. 1704 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-07-17 18:09:35,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104849726] [2020-07-17 18:09:35,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:35,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-07-17 18:09:35,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341611936] [2020-07-17 18:09:35,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-17 18:09:35,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:35,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-17 18:09:35,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-07-17 18:09:35,201 INFO L87 Difference]: Start difference. First operand 384 states and 397 transitions. Second operand 30 states. [2020-07-17 18:09:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:35,615 INFO L93 Difference]: Finished difference Result 407 states and 421 transitions. [2020-07-17 18:09:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-17 18:09:35,616 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 418 [2020-07-17 18:09:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:35,619 INFO L225 Difference]: With dead ends: 407 [2020-07-17 18:09:35,619 INFO L226 Difference]: Without dead ends: 405 [2020-07-17 18:09:35,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-07-17 18:09:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-07-17 18:09:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 400. [2020-07-17 18:09:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-07-17 18:09:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 414 transitions. [2020-07-17 18:09:35,662 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 414 transitions. Word has length 418 [2020-07-17 18:09:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:35,662 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 414 transitions. [2020-07-17 18:09:35,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-17 18:09:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 414 transitions. [2020-07-17 18:09:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-07-17 18:09:35,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:35,667 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:35,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-17 18:09:35,667 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:35,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1020812985, now seen corresponding path program 39 times [2020-07-17 18:09:35,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:35,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016243238] [2020-07-17 18:09:35,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5204 backedges. 2054 proven. 1850 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-07-17 18:09:37,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016243238] [2020-07-17 18:09:37,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:37,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-07-17 18:09:37,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903716546] [2020-07-17 18:09:37,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-17 18:09:37,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:37,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-17 18:09:37,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 18:09:37,866 INFO L87 Difference]: Start difference. First operand 400 states and 414 transitions. Second operand 56 states. [2020-07-17 18:09:42,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:42,726 INFO L93 Difference]: Finished difference Result 788 states and 880 transitions. [2020-07-17 18:09:42,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-07-17 18:09:42,727 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 438 [2020-07-17 18:09:42,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:42,730 INFO L225 Difference]: With dead ends: 788 [2020-07-17 18:09:42,731 INFO L226 Difference]: Without dead ends: 617 [2020-07-17 18:09:42,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-07-17 18:09:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-07-17 18:09:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 406. [2020-07-17 18:09:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-07-17 18:09:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 420 transitions. [2020-07-17 18:09:42,795 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 420 transitions. Word has length 438 [2020-07-17 18:09:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:42,796 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 420 transitions. [2020-07-17 18:09:42,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-17 18:09:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 420 transitions. [2020-07-17 18:09:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2020-07-17 18:09:42,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:42,800 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:42,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-17 18:09:42,801 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:42,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1862792015, now seen corresponding path program 40 times [2020-07-17 18:09:42,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:42,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462412703] [2020-07-17 18:09:42,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 2054 proven. 2002 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-07-17 18:09:45,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462412703] [2020-07-17 18:09:45,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:45,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-07-17 18:09:45,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071991681] [2020-07-17 18:09:45,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-17 18:09:45,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:45,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-17 18:09:45,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-07-17 18:09:45,157 INFO L87 Difference]: Start difference. First operand 406 states and 420 transitions. Second operand 57 states. [2020-07-17 18:09:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:50,393 INFO L93 Difference]: Finished difference Result 802 states and 897 transitions. [2020-07-17 18:09:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-07-17 18:09:50,393 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 444 [2020-07-17 18:09:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:50,396 INFO L225 Difference]: With dead ends: 802 [2020-07-17 18:09:50,396 INFO L226 Difference]: Without dead ends: 631 [2020-07-17 18:09:50,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3891, Invalid=8319, Unknown=0, NotChecked=0, Total=12210 [2020-07-17 18:09:50,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-07-17 18:09:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 412. [2020-07-17 18:09:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-07-17 18:09:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 426 transitions. [2020-07-17 18:09:50,443 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 426 transitions. Word has length 444 [2020-07-17 18:09:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:50,443 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 426 transitions. [2020-07-17 18:09:50,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-17 18:09:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 426 transitions. [2020-07-17 18:09:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-17 18:09:50,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:50,446 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:50,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-17 18:09:50,447 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash 420781911, now seen corresponding path program 41 times [2020-07-17 18:09:50,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:50,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048179595] [2020-07-17 18:09:50,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 2212 proven. 2002 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-07-17 18:09:51,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048179595] [2020-07-17 18:09:51,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:51,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-07-17 18:09:51,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880825496] [2020-07-17 18:09:51,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-17 18:09:51,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:51,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-17 18:09:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-07-17 18:09:51,583 INFO L87 Difference]: Start difference. First operand 412 states and 426 transitions. Second operand 32 states. [2020-07-17 18:09:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:52,063 INFO L93 Difference]: Finished difference Result 435 states and 450 transitions. [2020-07-17 18:09:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-17 18:09:52,065 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 450 [2020-07-17 18:09:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:52,068 INFO L225 Difference]: With dead ends: 435 [2020-07-17 18:09:52,068 INFO L226 Difference]: Without dead ends: 433 [2020-07-17 18:09:52,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-07-17 18:09:52,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-07-17 18:09:52,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 428. [2020-07-17 18:09:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-07-17 18:09:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 443 transitions. [2020-07-17 18:09:52,135 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 443 transitions. Word has length 450 [2020-07-17 18:09:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:52,136 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 443 transitions. [2020-07-17 18:09:52,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-17 18:09:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 443 transitions. [2020-07-17 18:09:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-17 18:09:52,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:52,143 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:09:52,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-07-17 18:09:52,143 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:52,144 INFO L82 PathProgramCache]: Analyzing trace with hash 538100083, now seen corresponding path program 42 times [2020-07-17 18:09:52,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:52,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151922416] [2020-07-17 18:09:52,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6052 backedges. 2380 proven. 2160 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-07-17 18:09:54,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151922416] [2020-07-17 18:09:54,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:54,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-07-17 18:09:54,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806583564] [2020-07-17 18:09:54,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-17 18:09:54,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:54,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-17 18:09:54,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 18:09:54,769 INFO L87 Difference]: Start difference. First operand 428 states and 443 transitions. Second operand 60 states. [2020-07-17 18:10:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:00,625 INFO L93 Difference]: Finished difference Result 844 states and 943 transitions. [2020-07-17 18:10:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-07-17 18:10:00,626 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 470 [2020-07-17 18:10:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:00,629 INFO L225 Difference]: With dead ends: 844 [2020-07-17 18:10:00,629 INFO L226 Difference]: Without dead ends: 661 [2020-07-17 18:10:00,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-07-17 18:10:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-07-17 18:10:00,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 434. [2020-07-17 18:10:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-07-17 18:10:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 449 transitions. [2020-07-17 18:10:00,677 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 449 transitions. Word has length 470 [2020-07-17 18:10:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:00,678 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 449 transitions. [2020-07-17 18:10:00,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-17 18:10:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 449 transitions. [2020-07-17 18:10:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-17 18:10:00,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:00,682 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:00,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-07-17 18:10:00,683 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1424552827, now seen corresponding path program 43 times [2020-07-17 18:10:00,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:00,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039820447] [2020-07-17 18:10:00,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 2380 proven. 2324 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-07-17 18:10:03,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039820447] [2020-07-17 18:10:03,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:03,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-07-17 18:10:03,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301925498] [2020-07-17 18:10:03,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-17 18:10:03,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:03,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-17 18:10:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2020-07-17 18:10:03,753 INFO L87 Difference]: Start difference. First operand 434 states and 449 transitions. Second operand 61 states. [2020-07-17 18:10:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:10,466 INFO L93 Difference]: Finished difference Result 858 states and 960 transitions. [2020-07-17 18:10:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-07-17 18:10:10,466 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 476 [2020-07-17 18:10:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:10,469 INFO L225 Difference]: With dead ends: 858 [2020-07-17 18:10:10,469 INFO L226 Difference]: Without dead ends: 675 [2020-07-17 18:10:10,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4469, Invalid=9573, Unknown=0, NotChecked=0, Total=14042 [2020-07-17 18:10:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-07-17 18:10:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 440. [2020-07-17 18:10:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-07-17 18:10:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 455 transitions. [2020-07-17 18:10:10,535 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 455 transitions. Word has length 476 [2020-07-17 18:10:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:10,535 INFO L479 AbstractCegarLoop]: Abstraction has 440 states and 455 transitions. [2020-07-17 18:10:10,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-17 18:10:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 455 transitions. [2020-07-17 18:10:10,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-17 18:10:10,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:10,544 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:10,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-07-17 18:10:10,545 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1341948029, now seen corresponding path program 44 times [2020-07-17 18:10:10,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:10,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509771617] [2020-07-17 18:10:10,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6386 backedges. 2550 proven. 2324 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-07-17 18:10:11,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509771617] [2020-07-17 18:10:11,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:11,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-07-17 18:10:11,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671506034] [2020-07-17 18:10:11,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-17 18:10:11,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:11,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-17 18:10:11,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 18:10:11,876 INFO L87 Difference]: Start difference. First operand 440 states and 455 transitions. Second operand 34 states. [2020-07-17 18:10:12,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:12,446 INFO L93 Difference]: Finished difference Result 463 states and 479 transitions. [2020-07-17 18:10:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-17 18:10:12,447 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 482 [2020-07-17 18:10:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:12,450 INFO L225 Difference]: With dead ends: 463 [2020-07-17 18:10:12,450 INFO L226 Difference]: Without dead ends: 461 [2020-07-17 18:10:12,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 18:10:12,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-07-17 18:10:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 456. [2020-07-17 18:10:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-07-17 18:10:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 472 transitions. [2020-07-17 18:10:12,498 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 472 transitions. Word has length 482 [2020-07-17 18:10:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:12,499 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 472 transitions. [2020-07-17 18:10:12,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-17 18:10:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 472 transitions. [2020-07-17 18:10:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-17 18:10:12,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:12,504 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:12,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-07-17 18:10:12,505 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:12,505 INFO L82 PathProgramCache]: Analyzing trace with hash -182725729, now seen corresponding path program 45 times [2020-07-17 18:10:12,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:12,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051844016] [2020-07-17 18:10:12,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6964 backedges. 2730 proven. 2494 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-07-17 18:10:15,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051844016] [2020-07-17 18:10:15,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:15,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-07-17 18:10:15,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486819061] [2020-07-17 18:10:15,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-07-17 18:10:15,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:15,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-07-17 18:10:15,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-07-17 18:10:15,779 INFO L87 Difference]: Start difference. First operand 456 states and 472 transitions. Second operand 64 states. [2020-07-17 18:10:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:22,707 INFO L93 Difference]: Finished difference Result 900 states and 1006 transitions. [2020-07-17 18:10:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-07-17 18:10:22,708 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 502 [2020-07-17 18:10:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:22,712 INFO L225 Difference]: With dead ends: 900 [2020-07-17 18:10:22,712 INFO L226 Difference]: Without dead ends: 705 [2020-07-17 18:10:22,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-07-17 18:10:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-07-17 18:10:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 462. [2020-07-17 18:10:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-07-17 18:10:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 478 transitions. [2020-07-17 18:10:22,774 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 478 transitions. Word has length 502 [2020-07-17 18:10:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:22,774 INFO L479 AbstractCegarLoop]: Abstraction has 462 states and 478 transitions. [2020-07-17 18:10:22,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-07-17 18:10:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 478 transitions. [2020-07-17 18:10:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-17 18:10:22,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:22,779 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:22,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-07-17 18:10:22,779 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:22,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1667753383, now seen corresponding path program 46 times [2020-07-17 18:10:22,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:22,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613079647] [2020-07-17 18:10:22,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 2730 proven. 2670 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-07-17 18:10:25,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613079647] [2020-07-17 18:10:25,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:25,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-07-17 18:10:25,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935548696] [2020-07-17 18:10:25,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-17 18:10:25,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:25,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-17 18:10:25,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-07-17 18:10:25,932 INFO L87 Difference]: Start difference. First operand 462 states and 478 transitions. Second operand 65 states. [2020-07-17 18:10:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:32,574 INFO L93 Difference]: Finished difference Result 914 states and 1023 transitions. [2020-07-17 18:10:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-07-17 18:10:32,574 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 508 [2020-07-17 18:10:32,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:32,578 INFO L225 Difference]: With dead ends: 914 [2020-07-17 18:10:32,578 INFO L226 Difference]: Without dead ends: 719 [2020-07-17 18:10:32,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=5087, Invalid=10915, Unknown=0, NotChecked=0, Total=16002 [2020-07-17 18:10:32,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2020-07-17 18:10:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 468. [2020-07-17 18:10:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-07-17 18:10:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 484 transitions. [2020-07-17 18:10:32,635 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 484 transitions. Word has length 508 [2020-07-17 18:10:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:32,636 INFO L479 AbstractCegarLoop]: Abstraction has 468 states and 484 transitions. [2020-07-17 18:10:32,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-17 18:10:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 484 transitions. [2020-07-17 18:10:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-07-17 18:10:32,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:32,641 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:32,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-07-17 18:10:32,641 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:32,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:32,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1072672337, now seen corresponding path program 47 times [2020-07-17 18:10:32,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:32,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350751357] [2020-07-17 18:10:32,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7322 backedges. 2912 proven. 2670 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-07-17 18:10:34,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350751357] [2020-07-17 18:10:34,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:34,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-07-17 18:10:34,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669217897] [2020-07-17 18:10:34,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-17 18:10:34,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:34,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-17 18:10:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 18:10:34,174 INFO L87 Difference]: Start difference. First operand 468 states and 484 transitions. Second operand 36 states. [2020-07-17 18:10:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:34,929 INFO L93 Difference]: Finished difference Result 491 states and 508 transitions. [2020-07-17 18:10:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-17 18:10:34,930 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 514 [2020-07-17 18:10:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:34,934 INFO L225 Difference]: With dead ends: 491 [2020-07-17 18:10:34,934 INFO L226 Difference]: Without dead ends: 489 [2020-07-17 18:10:34,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-07-17 18:10:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-07-17 18:10:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 484. [2020-07-17 18:10:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-07-17 18:10:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 501 transitions. [2020-07-17 18:10:35,017 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 501 transitions. Word has length 514 [2020-07-17 18:10:35,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:35,018 INFO L479 AbstractCegarLoop]: Abstraction has 484 states and 501 transitions. [2020-07-17 18:10:35,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-17 18:10:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 501 transitions. [2020-07-17 18:10:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-07-17 18:10:35,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:35,024 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:35,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-07-17 18:10:35,024 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash 718657483, now seen corresponding path program 48 times [2020-07-17 18:10:35,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:35,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160347112] [2020-07-17 18:10:35,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7940 backedges. 3104 proven. 2852 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-07-17 18:10:38,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160347112] [2020-07-17 18:10:38,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:38,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-07-17 18:10:38,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467602563] [2020-07-17 18:10:38,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-07-17 18:10:38,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-07-17 18:10:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-07-17 18:10:38,851 INFO L87 Difference]: Start difference. First operand 484 states and 501 transitions. Second operand 68 states. [2020-07-17 18:10:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:46,774 INFO L93 Difference]: Finished difference Result 956 states and 1069 transitions. [2020-07-17 18:10:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-07-17 18:10:46,775 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 534 [2020-07-17 18:10:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:46,779 INFO L225 Difference]: With dead ends: 956 [2020-07-17 18:10:46,779 INFO L226 Difference]: Without dead ends: 749 [2020-07-17 18:10:46,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-07-17 18:10:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-07-17 18:10:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 490. [2020-07-17 18:10:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-17 18:10:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 507 transitions. [2020-07-17 18:10:46,849 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 507 transitions. Word has length 534 [2020-07-17 18:10:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:46,850 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 507 transitions. [2020-07-17 18:10:46,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-07-17 18:10:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 507 transitions. [2020-07-17 18:10:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2020-07-17 18:10:46,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:46,853 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:46,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-07-17 18:10:46,854 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:46,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2095593005, now seen corresponding path program 49 times [2020-07-17 18:10:46,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:46,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113694345] [2020-07-17 18:10:46,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 3104 proven. 3040 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-07-17 18:10:51,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113694345] [2020-07-17 18:10:51,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:51,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-07-17 18:10:51,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431899800] [2020-07-17 18:10:51,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-17 18:10:51,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:51,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-17 18:10:51,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=3501, Unknown=0, NotChecked=0, Total=4692 [2020-07-17 18:10:51,034 INFO L87 Difference]: Start difference. First operand 490 states and 507 transitions. Second operand 69 states. [2020-07-17 18:10:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:59,244 INFO L93 Difference]: Finished difference Result 970 states and 1086 transitions. [2020-07-17 18:10:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-17 18:10:59,244 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 540 [2020-07-17 18:10:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:59,247 INFO L225 Difference]: With dead ends: 970 [2020-07-17 18:10:59,247 INFO L226 Difference]: Without dead ends: 763 [2020-07-17 18:10:59,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=5745, Invalid=12345, Unknown=0, NotChecked=0, Total=18090 [2020-07-17 18:10:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-07-17 18:10:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 496. [2020-07-17 18:10:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-07-17 18:10:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 513 transitions. [2020-07-17 18:10:59,326 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 513 transitions. Word has length 540 [2020-07-17 18:10:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:59,326 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 513 transitions. [2020-07-17 18:10:59,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-17 18:10:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 513 transitions. [2020-07-17 18:10:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2020-07-17 18:10:59,329 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:59,329 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:10:59,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-07-17 18:10:59,330 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:59,330 INFO L82 PathProgramCache]: Analyzing trace with hash 835589595, now seen corresponding path program 50 times [2020-07-17 18:10:59,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:59,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550157347] [2020-07-17 18:10:59,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8322 backedges. 3298 proven. 3040 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-07-17 18:11:00,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550157347] [2020-07-17 18:11:00,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:01,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-07-17 18:11:01,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576660672] [2020-07-17 18:11:01,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-17 18:11:01,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:01,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-17 18:11:01,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 18:11:01,001 INFO L87 Difference]: Start difference. First operand 496 states and 513 transitions. Second operand 38 states. [2020-07-17 18:11:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:01,766 INFO L93 Difference]: Finished difference Result 519 states and 537 transitions. [2020-07-17 18:11:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-17 18:11:01,768 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 546 [2020-07-17 18:11:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:01,771 INFO L225 Difference]: With dead ends: 519 [2020-07-17 18:11:01,771 INFO L226 Difference]: Without dead ends: 517 [2020-07-17 18:11:01,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 18:11:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-17 18:11:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 512. [2020-07-17 18:11:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-07-17 18:11:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 530 transitions. [2020-07-17 18:11:01,832 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 530 transitions. Word has length 546 [2020-07-17 18:11:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:01,833 INFO L479 AbstractCegarLoop]: Abstraction has 512 states and 530 transitions. [2020-07-17 18:11:01,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-17 18:11:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 530 transitions. [2020-07-17 18:11:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2020-07-17 18:11:01,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:01,836 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:11:01,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-07-17 18:11:01,836 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:01,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1571566089, now seen corresponding path program 51 times [2020-07-17 18:11:01,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:01,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226483869] [2020-07-17 18:11:01,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8980 backedges. 3502 proven. 3234 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-07-17 18:11:06,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226483869] [2020-07-17 18:11:06,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:06,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-07-17 18:11:06,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336718341] [2020-07-17 18:11:06,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-17 18:11:06,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:06,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-17 18:11:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-07-17 18:11:06,591 INFO L87 Difference]: Start difference. First operand 512 states and 530 transitions. Second operand 72 states. [2020-07-17 18:11:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:16,129 INFO L93 Difference]: Finished difference Result 1012 states and 1132 transitions. [2020-07-17 18:11:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-07-17 18:11:16,130 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 566 [2020-07-17 18:11:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:16,134 INFO L225 Difference]: With dead ends: 1012 [2020-07-17 18:11:16,135 INFO L226 Difference]: Without dead ends: 793 [2020-07-17 18:11:16,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-07-17 18:11:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-07-17 18:11:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 518. [2020-07-17 18:11:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-07-17 18:11:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 536 transitions. [2020-07-17 18:11:16,192 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 536 transitions. Word has length 566 [2020-07-17 18:11:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:16,193 INFO L479 AbstractCegarLoop]: Abstraction has 518 states and 536 transitions. [2020-07-17 18:11:16,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-17 18:11:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 536 transitions. [2020-07-17 18:11:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-17 18:11:16,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:16,198 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:11:16,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-07-17 18:11:16,198 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:16,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1794400257, now seen corresponding path program 52 times [2020-07-17 18:11:16,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:16,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834250662] [2020-07-17 18:11:16,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 3502 proven. 3434 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-07-17 18:11:21,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834250662] [2020-07-17 18:11:21,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:21,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-07-17 18:11:21,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594363098] [2020-07-17 18:11:21,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-17 18:11:21,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:21,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-17 18:11:21,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3923, Unknown=0, NotChecked=0, Total=5256 [2020-07-17 18:11:21,404 INFO L87 Difference]: Start difference. First operand 518 states and 536 transitions. Second operand 73 states. [2020-07-17 18:11:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:31,143 INFO L93 Difference]: Finished difference Result 1026 states and 1149 transitions. [2020-07-17 18:11:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-07-17 18:11:31,143 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 572 [2020-07-17 18:11:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:31,147 INFO L225 Difference]: With dead ends: 1026 [2020-07-17 18:11:31,147 INFO L226 Difference]: Without dead ends: 807 [2020-07-17 18:11:31,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=6443, Invalid=13863, Unknown=0, NotChecked=0, Total=20306 [2020-07-17 18:11:31,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2020-07-17 18:11:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 524. [2020-07-17 18:11:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-07-17 18:11:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 542 transitions. [2020-07-17 18:11:31,237 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 542 transitions. Word has length 572 [2020-07-17 18:11:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:31,238 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 542 transitions. [2020-07-17 18:11:31,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-17 18:11:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 542 transitions. [2020-07-17 18:11:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2020-07-17 18:11:31,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:31,242 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:11:31,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-07-17 18:11:31,242 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash -430978041, now seen corresponding path program 53 times [2020-07-17 18:11:31,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:31,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726644902] [2020-07-17 18:11:31,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9386 backedges. 3708 proven. 3434 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-07-17 18:11:33,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726644902] [2020-07-17 18:11:33,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:33,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-07-17 18:11:33,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984248497] [2020-07-17 18:11:33,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-17 18:11:33,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:33,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-17 18:11:33,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 18:11:33,217 INFO L87 Difference]: Start difference. First operand 524 states and 542 transitions. Second operand 40 states. [2020-07-17 18:11:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:34,110 INFO L93 Difference]: Finished difference Result 547 states and 566 transitions. [2020-07-17 18:11:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-17 18:11:34,112 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 578 [2020-07-17 18:11:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:34,115 INFO L225 Difference]: With dead ends: 547 [2020-07-17 18:11:34,115 INFO L226 Difference]: Without dead ends: 545 [2020-07-17 18:11:34,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-07-17 18:11:34,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-07-17 18:11:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 540. [2020-07-17 18:11:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-07-17 18:11:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 559 transitions. [2020-07-17 18:11:34,175 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 559 transitions. Word has length 578 [2020-07-17 18:11:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:34,176 INFO L479 AbstractCegarLoop]: Abstraction has 540 states and 559 transitions. [2020-07-17 18:11:34,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-17 18:11:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 559 transitions. [2020-07-17 18:11:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2020-07-17 18:11:34,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:34,181 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:11:34,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-07-17 18:11:34,182 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash -181881309, now seen corresponding path program 54 times [2020-07-17 18:11:34,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:34,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103865252] [2020-07-17 18:11:34,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10084 backedges. 3924 proven. 3640 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-07-17 18:11:39,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103865252] [2020-07-17 18:11:39,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:39,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-07-17 18:11:39,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376372273] [2020-07-17 18:11:39,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-07-17 18:11:39,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:39,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-07-17 18:11:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-07-17 18:11:39,524 INFO L87 Difference]: Start difference. First operand 540 states and 559 transitions. Second operand 76 states. [2020-07-17 18:11:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:50,590 INFO L93 Difference]: Finished difference Result 1068 states and 1195 transitions. [2020-07-17 18:11:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-07-17 18:11:50,592 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 598 [2020-07-17 18:11:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:50,595 INFO L225 Difference]: With dead ends: 1068 [2020-07-17 18:11:50,596 INFO L226 Difference]: Without dead ends: 837 [2020-07-17 18:11:50,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-07-17 18:11:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-07-17 18:11:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 546. [2020-07-17 18:11:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-07-17 18:11:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 565 transitions. [2020-07-17 18:11:50,660 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 565 transitions. Word has length 598 [2020-07-17 18:11:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:50,660 INFO L479 AbstractCegarLoop]: Abstraction has 546 states and 565 transitions. [2020-07-17 18:11:50,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-07-17 18:11:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 565 transitions. [2020-07-17 18:11:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2020-07-17 18:11:50,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:50,664 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:11:50,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-07-17 18:11:50,664 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash 852912171, now seen corresponding path program 55 times [2020-07-17 18:11:50,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:50,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725034361] [2020-07-17 18:11:50,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 3924 proven. 3852 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-07-17 18:11:57,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725034361] [2020-07-17 18:11:57,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:57,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-07-17 18:11:57,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126491590] [2020-07-17 18:11:57,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-07-17 18:11:57,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:57,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-07-17 18:11:57,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2020-07-17 18:11:57,087 INFO L87 Difference]: Start difference. First operand 546 states and 565 transitions. Second operand 77 states. [2020-07-17 18:12:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:09,897 INFO L93 Difference]: Finished difference Result 1082 states and 1212 transitions. [2020-07-17 18:12:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-07-17 18:12:09,897 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 604 [2020-07-17 18:12:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:09,901 INFO L225 Difference]: With dead ends: 1082 [2020-07-17 18:12:09,901 INFO L226 Difference]: Without dead ends: 851 [2020-07-17 18:12:09,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=7181, Invalid=15469, Unknown=0, NotChecked=0, Total=22650 [2020-07-17 18:12:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-07-17 18:12:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 552. [2020-07-17 18:12:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-07-17 18:12:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 571 transitions. [2020-07-17 18:12:09,971 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 571 transitions. Word has length 604 [2020-07-17 18:12:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:09,971 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 571 transitions. [2020-07-17 18:12:09,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-07-17 18:12:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 571 transitions. [2020-07-17 18:12:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2020-07-17 18:12:09,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:09,975 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:12:09,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-07-17 18:12:09,975 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1999139891, now seen corresponding path program 56 times [2020-07-17 18:12:09,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:09,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383734387] [2020-07-17 18:12:09,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10514 backedges. 4142 proven. 3852 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-07-17 18:12:12,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383734387] [2020-07-17 18:12:12,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:12,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-07-17 18:12:12,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42584717] [2020-07-17 18:12:12,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-17 18:12:12,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-17 18:12:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 18:12:12,584 INFO L87 Difference]: Start difference. First operand 552 states and 571 transitions. Second operand 42 states. [2020-07-17 18:12:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:13,702 INFO L93 Difference]: Finished difference Result 575 states and 595 transitions. [2020-07-17 18:12:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-17 18:12:13,704 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 610 [2020-07-17 18:12:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:13,707 INFO L225 Difference]: With dead ends: 575 [2020-07-17 18:12:13,707 INFO L226 Difference]: Without dead ends: 573 [2020-07-17 18:12:13,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-07-17 18:12:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-07-17 18:12:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2020-07-17 18:12:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-07-17 18:12:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 588 transitions. [2020-07-17 18:12:13,773 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 588 transitions. Word has length 610 [2020-07-17 18:12:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:13,773 INFO L479 AbstractCegarLoop]: Abstraction has 568 states and 588 transitions. [2020-07-17 18:12:13,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-17 18:12:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 588 transitions. [2020-07-17 18:12:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2020-07-17 18:12:13,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:13,777 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:12:13,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-07-17 18:12:13,778 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash 895979599, now seen corresponding path program 57 times [2020-07-17 18:12:13,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:13,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093260192] [2020-07-17 18:12:13,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11252 backedges. 4370 proven. 4070 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-07-17 18:12:20,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093260192] [2020-07-17 18:12:20,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:20,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-07-17 18:12:20,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84740488] [2020-07-17 18:12:20,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-07-17 18:12:20,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:20,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-07-17 18:12:20,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-07-17 18:12:20,820 INFO L87 Difference]: Start difference. First operand 568 states and 588 transitions. Second operand 80 states. [2020-07-17 18:12:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:34,496 INFO L93 Difference]: Finished difference Result 1124 states and 1258 transitions. [2020-07-17 18:12:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-07-17 18:12:34,498 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 630 [2020-07-17 18:12:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:34,504 INFO L225 Difference]: With dead ends: 1124 [2020-07-17 18:12:34,505 INFO L226 Difference]: Without dead ends: 881 [2020-07-17 18:12:34,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-07-17 18:12:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-07-17 18:12:34,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 574. [2020-07-17 18:12:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-07-17 18:12:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 594 transitions. [2020-07-17 18:12:34,577 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 594 transitions. Word has length 630 [2020-07-17 18:12:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:34,577 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 594 transitions. [2020-07-17 18:12:34,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-07-17 18:12:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 594 transitions. [2020-07-17 18:12:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2020-07-17 18:12:34,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:34,581 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:12:34,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-07-17 18:12:34,581 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:34,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1854612055, now seen corresponding path program 58 times [2020-07-17 18:12:34,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:34,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871368804] [2020-07-17 18:12:34,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 4370 proven. 4294 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-07-17 18:12:42,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871368804] [2020-07-17 18:12:42,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:42,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-07-17 18:12:42,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272777372] [2020-07-17 18:12:42,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-07-17 18:12:42,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:42,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-07-17 18:12:42,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1641, Invalid=4839, Unknown=0, NotChecked=0, Total=6480 [2020-07-17 18:12:42,320 INFO L87 Difference]: Start difference. First operand 574 states and 594 transitions. Second operand 81 states. [2020-07-17 18:12:58,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:58,002 INFO L93 Difference]: Finished difference Result 1138 states and 1275 transitions. [2020-07-17 18:12:58,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-07-17 18:12:58,002 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 636 [2020-07-17 18:12:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:58,005 INFO L225 Difference]: With dead ends: 1138 [2020-07-17 18:12:58,006 INFO L226 Difference]: Without dead ends: 895 [2020-07-17 18:12:58,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=7959, Invalid=17163, Unknown=0, NotChecked=0, Total=25122 [2020-07-17 18:12:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2020-07-17 18:12:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 580. [2020-07-17 18:12:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-07-17 18:12:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 600 transitions. [2020-07-17 18:12:58,073 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 600 transitions. Word has length 636 [2020-07-17 18:12:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:58,073 INFO L479 AbstractCegarLoop]: Abstraction has 580 states and 600 transitions. [2020-07-17 18:12:58,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-07-17 18:12:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 600 transitions. [2020-07-17 18:12:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-07-17 18:12:58,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:58,078 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:12:58,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-07-17 18:12:58,078 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:58,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:58,078 INFO L82 PathProgramCache]: Analyzing trace with hash -160756129, now seen corresponding path program 59 times [2020-07-17 18:12:58,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:58,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542979635] [2020-07-17 18:12:58,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11706 backedges. 4600 proven. 4294 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-07-17 18:13:01,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542979635] [2020-07-17 18:13:01,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:13:01,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-07-17 18:13:01,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859254895] [2020-07-17 18:13:01,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-17 18:13:01,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:13:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-17 18:13:01,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 18:13:01,283 INFO L87 Difference]: Start difference. First operand 580 states and 600 transitions. Second operand 44 states. [2020-07-17 18:13:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:13:02,487 INFO L93 Difference]: Finished difference Result 603 states and 624 transitions. [2020-07-17 18:13:02,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-17 18:13:02,490 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 642 [2020-07-17 18:13:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:13:02,494 INFO L225 Difference]: With dead ends: 603 [2020-07-17 18:13:02,494 INFO L226 Difference]: Without dead ends: 601 [2020-07-17 18:13:02,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-07-17 18:13:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-07-17 18:13:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 596. [2020-07-17 18:13:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-07-17 18:13:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 617 transitions. [2020-07-17 18:13:02,567 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 617 transitions. Word has length 642 [2020-07-17 18:13:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:13:02,568 INFO L479 AbstractCegarLoop]: Abstraction has 596 states and 617 transitions. [2020-07-17 18:13:02,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-17 18:13:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 617 transitions. [2020-07-17 18:13:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2020-07-17 18:13:02,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:13:02,572 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:13:02,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-07-17 18:13:02,572 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:13:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:13:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1381802885, now seen corresponding path program 60 times [2020-07-17 18:13:02,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:13:02,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82204365] [2020-07-17 18:13:02,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:13:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12484 backedges. 4840 proven. 4524 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-07-17 18:13:11,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82204365] [2020-07-17 18:13:11,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:13:11,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-07-17 18:13:11,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994273982] [2020-07-17 18:13:11,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-07-17 18:13:11,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:13:11,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-07-17 18:13:11,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-07-17 18:13:11,037 INFO L87 Difference]: Start difference. First operand 596 states and 617 transitions. Second operand 84 states. [2020-07-17 18:13:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:13:26,857 INFO L93 Difference]: Finished difference Result 1180 states and 1321 transitions. [2020-07-17 18:13:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-07-17 18:13:26,860 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 662 [2020-07-17 18:13:26,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:13:26,865 INFO L225 Difference]: With dead ends: 1180 [2020-07-17 18:13:26,865 INFO L226 Difference]: Without dead ends: 925 [2020-07-17 18:13:26,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-07-17 18:13:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-07-17 18:13:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 602. [2020-07-17 18:13:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-07-17 18:13:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 623 transitions. [2020-07-17 18:13:26,945 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 623 transitions. Word has length 662 [2020-07-17 18:13:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:13:26,945 INFO L479 AbstractCegarLoop]: Abstraction has 602 states and 623 transitions. [2020-07-17 18:13:26,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-07-17 18:13:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 623 transitions. [2020-07-17 18:13:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2020-07-17 18:13:26,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:13:26,950 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:13:26,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-07-17 18:13:26,950 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:13:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:13:26,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1833120125, now seen corresponding path program 61 times [2020-07-17 18:13:26,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:13:26,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396651965] [2020-07-17 18:13:26,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:13:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 4840 proven. 4760 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-07-17 18:13:36,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396651965] [2020-07-17 18:13:36,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:13:36,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-07-17 18:13:36,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199992274] [2020-07-17 18:13:36,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-07-17 18:13:36,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:13:36,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-07-17 18:13:36,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5333, Unknown=0, NotChecked=0, Total=7140 [2020-07-17 18:13:36,319 INFO L87 Difference]: Start difference. First operand 602 states and 623 transitions. Second operand 85 states. [2020-07-17 18:13:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:13:54,622 INFO L93 Difference]: Finished difference Result 1194 states and 1338 transitions. [2020-07-17 18:13:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-07-17 18:13:54,622 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 668 [2020-07-17 18:13:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:13:54,627 INFO L225 Difference]: With dead ends: 1194 [2020-07-17 18:13:54,627 INFO L226 Difference]: Without dead ends: 939 [2020-07-17 18:13:54,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=8777, Invalid=18945, Unknown=0, NotChecked=0, Total=27722 [2020-07-17 18:13:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2020-07-17 18:13:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 608. [2020-07-17 18:13:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-07-17 18:13:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 629 transitions. [2020-07-17 18:13:54,712 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 629 transitions. Word has length 668 [2020-07-17 18:13:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:13:54,713 INFO L479 AbstractCegarLoop]: Abstraction has 608 states and 629 transitions. [2020-07-17 18:13:54,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-07-17 18:13:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 629 transitions. [2020-07-17 18:13:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-07-17 18:13:54,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:13:54,718 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:13:54,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-07-17 18:13:54,718 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:13:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:13:54,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1364551029, now seen corresponding path program 62 times [2020-07-17 18:13:54,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:13:54,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019514350] [2020-07-17 18:13:54,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:13:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12962 backedges. 5082 proven. 4760 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-07-17 18:13:58,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019514350] [2020-07-17 18:13:58,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:13:58,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-07-17 18:13:58,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284660186] [2020-07-17 18:13:58,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-17 18:13:58,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:13:58,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-17 18:13:58,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 18:13:58,144 INFO L87 Difference]: Start difference. First operand 608 states and 629 transitions. Second operand 46 states. [2020-07-17 18:13:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:13:59,729 INFO L93 Difference]: Finished difference Result 631 states and 653 transitions. [2020-07-17 18:13:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-17 18:13:59,733 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 674 [2020-07-17 18:13:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:13:59,739 INFO L225 Difference]: With dead ends: 631 [2020-07-17 18:13:59,739 INFO L226 Difference]: Without dead ends: 629 [2020-07-17 18:13:59,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-07-17 18:13:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-07-17 18:13:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 624. [2020-07-17 18:13:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-07-17 18:13:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 646 transitions. [2020-07-17 18:13:59,823 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 646 transitions. Word has length 674 [2020-07-17 18:13:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:13:59,824 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 646 transitions. [2020-07-17 18:13:59,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-17 18:13:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 646 transitions. [2020-07-17 18:13:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2020-07-17 18:13:59,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:13:59,829 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:13:59,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-07-17 18:13:59,829 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:13:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:13:59,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1594942809, now seen corresponding path program 63 times [2020-07-17 18:13:59,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:13:59,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500690463] [2020-07-17 18:13:59,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:13:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13780 backedges. 5334 proven. 5002 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-07-17 18:14:10,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500690463] [2020-07-17 18:14:10,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:14:10,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-07-17 18:14:10,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833331523] [2020-07-17 18:14:10,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-07-17 18:14:10,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:14:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-07-17 18:14:10,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-07-17 18:14:10,100 INFO L87 Difference]: Start difference. First operand 624 states and 646 transitions. Second operand 88 states. [2020-07-17 18:14:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:14:30,741 INFO L93 Difference]: Finished difference Result 1236 states and 1384 transitions. [2020-07-17 18:14:30,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-07-17 18:14:30,745 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 694 [2020-07-17 18:14:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:14:30,751 INFO L225 Difference]: With dead ends: 1236 [2020-07-17 18:14:30,752 INFO L226 Difference]: Without dead ends: 969 [2020-07-17 18:14:30,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3568 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-07-17 18:14:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-07-17 18:14:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 630. [2020-07-17 18:14:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-07-17 18:14:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 652 transitions. [2020-07-17 18:14:30,847 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 652 transitions. Word has length 694 [2020-07-17 18:14:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:14:30,848 INFO L479 AbstractCegarLoop]: Abstraction has 630 states and 652 transitions. [2020-07-17 18:14:30,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-07-17 18:14:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 652 transitions. [2020-07-17 18:14:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2020-07-17 18:14:30,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:14:30,854 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:14:30,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-07-17 18:14:30,854 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:14:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:14:30,855 INFO L82 PathProgramCache]: Analyzing trace with hash -495031121, now seen corresponding path program 64 times [2020-07-17 18:14:30,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:14:30,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148876856] [2020-07-17 18:14:30,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:14:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 5334 proven. 5250 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-07-17 18:14:42,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148876856] [2020-07-17 18:14:42,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:14:42,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-07-17 18:14:42,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554051991] [2020-07-17 18:14:42,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-07-17 18:14:42,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:14:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-07-17 18:14:42,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1981, Invalid=5851, Unknown=0, NotChecked=0, Total=7832 [2020-07-17 18:14:42,137 INFO L87 Difference]: Start difference. First operand 630 states and 652 transitions. Second operand 89 states. [2020-07-17 18:15:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:15:04,960 INFO L93 Difference]: Finished difference Result 1250 states and 1401 transitions. [2020-07-17 18:15:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-07-17 18:15:04,961 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 700 [2020-07-17 18:15:04,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:15:04,966 INFO L225 Difference]: With dead ends: 1250 [2020-07-17 18:15:04,966 INFO L226 Difference]: Without dead ends: 983 [2020-07-17 18:15:04,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=9635, Invalid=20815, Unknown=0, NotChecked=0, Total=30450 [2020-07-17 18:15:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-07-17 18:15:05,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 636. [2020-07-17 18:15:05,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2020-07-17 18:15:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 658 transitions. [2020-07-17 18:15:05,104 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 658 transitions. Word has length 700 [2020-07-17 18:15:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:15:05,104 INFO L479 AbstractCegarLoop]: Abstraction has 636 states and 658 transitions. [2020-07-17 18:15:05,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-07-17 18:15:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 658 transitions. [2020-07-17 18:15:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2020-07-17 18:15:05,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:15:05,109 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:15:05,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-07-17 18:15:05,109 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:15:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:15:05,110 INFO L82 PathProgramCache]: Analyzing trace with hash -486926153, now seen corresponding path program 65 times [2020-07-17 18:15:05,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:15:05,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623569558] [2020-07-17 18:15:05,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:15:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14282 backedges. 5588 proven. 5250 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-07-17 18:15:09,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623569558] [2020-07-17 18:15:09,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:15:09,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-07-17 18:15:09,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045783778] [2020-07-17 18:15:09,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-17 18:15:09,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:15:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-17 18:15:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 18:15:09,545 INFO L87 Difference]: Start difference. First operand 636 states and 658 transitions. Second operand 48 states. [2020-07-17 18:15:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:15:11,384 INFO L93 Difference]: Finished difference Result 659 states and 682 transitions. [2020-07-17 18:15:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-17 18:15:11,386 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 706 [2020-07-17 18:15:11,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:15:11,391 INFO L225 Difference]: With dead ends: 659 [2020-07-17 18:15:11,391 INFO L226 Difference]: Without dead ends: 657 [2020-07-17 18:15:11,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-07-17 18:15:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-07-17 18:15:11,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 652. [2020-07-17 18:15:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2020-07-17 18:15:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 675 transitions. [2020-07-17 18:15:11,487 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 675 transitions. Word has length 706 [2020-07-17 18:15:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:15:11,488 INFO L479 AbstractCegarLoop]: Abstraction has 652 states and 675 transitions. [2020-07-17 18:15:11,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-17 18:15:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 675 transitions. [2020-07-17 18:15:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2020-07-17 18:15:11,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:15:11,495 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:15:11,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-07-17 18:15:11,495 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:15:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:15:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash 182307539, now seen corresponding path program 66 times [2020-07-17 18:15:11,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:15:11,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621297838] [2020-07-17 18:15:11,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:15:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15140 backedges. 5852 proven. 5504 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-07-17 18:15:23,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621297838] [2020-07-17 18:15:23,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:15:23,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-07-17 18:15:23,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247251594] [2020-07-17 18:15:23,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-07-17 18:15:23,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:15:23,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-07-17 18:15:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-07-17 18:15:23,756 INFO L87 Difference]: Start difference. First operand 652 states and 675 transitions. Second operand 92 states. [2020-07-17 18:15:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:15:48,993 INFO L93 Difference]: Finished difference Result 1292 states and 1447 transitions. [2020-07-17 18:15:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-07-17 18:15:49,000 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 726 [2020-07-17 18:15:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:15:49,004 INFO L225 Difference]: With dead ends: 1292 [2020-07-17 18:15:49,005 INFO L226 Difference]: Without dead ends: 1013 [2020-07-17 18:15:49,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-07-17 18:15:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-07-17 18:15:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 658. [2020-07-17 18:15:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-07-17 18:15:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 681 transitions. [2020-07-17 18:15:49,198 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 681 transitions. Word has length 726 [2020-07-17 18:15:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:15:49,198 INFO L479 AbstractCegarLoop]: Abstraction has 658 states and 681 transitions. [2020-07-17 18:15:49,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-07-17 18:15:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 681 transitions. [2020-07-17 18:15:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2020-07-17 18:15:49,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:15:49,204 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:15:49,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-07-17 18:15:49,204 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:15:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:15:49,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1499659483, now seen corresponding path program 67 times [2020-07-17 18:15:49,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:15:49,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339502347] [2020-07-17 18:15:49,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:15:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 5852 proven. 5764 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-07-17 18:16:02,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339502347] [2020-07-17 18:16:02,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:16:02,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-07-17 18:16:02,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949728941] [2020-07-17 18:16:02,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-07-17 18:16:02,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:16:02,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-07-17 18:16:02,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2163, Invalid=6393, Unknown=0, NotChecked=0, Total=8556 [2020-07-17 18:16:02,875 INFO L87 Difference]: Start difference. First operand 658 states and 681 transitions. Second operand 93 states. [2020-07-17 18:16:30,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:16:30,170 INFO L93 Difference]: Finished difference Result 1306 states and 1464 transitions. [2020-07-17 18:16:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-07-17 18:16:30,170 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 732 [2020-07-17 18:16:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:16:30,173 INFO L225 Difference]: With dead ends: 1306 [2020-07-17 18:16:30,173 INFO L226 Difference]: Without dead ends: 1027 [2020-07-17 18:16:30,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=10533, Invalid=22773, Unknown=0, NotChecked=0, Total=33306 [2020-07-17 18:16:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2020-07-17 18:16:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 664. [2020-07-17 18:16:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-07-17 18:16:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 687 transitions. [2020-07-17 18:16:30,271 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 687 transitions. Word has length 732 [2020-07-17 18:16:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:16:30,272 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 687 transitions. [2020-07-17 18:16:30,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-07-17 18:16:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 687 transitions. [2020-07-17 18:16:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 739 [2020-07-17 18:16:30,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:16:30,277 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:16:30,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-07-17 18:16:30,278 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:16:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:16:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1897101085, now seen corresponding path program 68 times [2020-07-17 18:16:30,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:16:30,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872153670] [2020-07-17 18:16:30,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:16:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15666 backedges. 6118 proven. 5764 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-07-17 18:16:35,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872153670] [2020-07-17 18:16:35,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:16:35,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-07-17 18:16:35,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871854203] [2020-07-17 18:16:35,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-17 18:16:35,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:16:35,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-17 18:16:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 18:16:35,713 INFO L87 Difference]: Start difference. First operand 664 states and 687 transitions. Second operand 50 states. [2020-07-17 18:16:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:16:37,853 INFO L93 Difference]: Finished difference Result 687 states and 711 transitions. [2020-07-17 18:16:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-17 18:16:37,856 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 738 [2020-07-17 18:16:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:16:37,859 INFO L225 Difference]: With dead ends: 687 [2020-07-17 18:16:37,859 INFO L226 Difference]: Without dead ends: 685 [2020-07-17 18:16:37,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2020-07-17 18:16:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-07-17 18:16:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 680. [2020-07-17 18:16:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-07-17 18:16:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 704 transitions. [2020-07-17 18:16:37,953 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 704 transitions. Word has length 738 [2020-07-17 18:16:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:16:37,954 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 704 transitions. [2020-07-17 18:16:37,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-17 18:16:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 704 transitions. [2020-07-17 18:16:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2020-07-17 18:16:37,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:16:37,960 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:16:37,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-07-17 18:16:37,960 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:16:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:16:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1602383103, now seen corresponding path program 69 times [2020-07-17 18:16:37,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:16:37,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646237816] [2020-07-17 18:16:37,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:16:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16564 backedges. 6394 proven. 6030 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-07-17 18:16:51,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646237816] [2020-07-17 18:16:51,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:16:51,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-07-17 18:16:51,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774160427] [2020-07-17 18:16:51,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-17 18:16:51,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:16:51,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-17 18:16:51,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-07-17 18:16:51,410 INFO L87 Difference]: Start difference. First operand 680 states and 704 transitions. Second operand 96 states. [2020-07-17 18:17:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:17:12,814 INFO L93 Difference]: Finished difference Result 1348 states and 1510 transitions. [2020-07-17 18:17:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-07-17 18:17:12,817 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 758 [2020-07-17 18:17:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:17:12,821 INFO L225 Difference]: With dead ends: 1348 [2020-07-17 18:17:12,821 INFO L226 Difference]: Without dead ends: 1057 [2020-07-17 18:17:12,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-07-17 18:17:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2020-07-17 18:17:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 686. [2020-07-17 18:17:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2020-07-17 18:17:12,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 710 transitions. [2020-07-17 18:17:12,919 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 710 transitions. Word has length 758 [2020-07-17 18:17:12,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:17:12,919 INFO L479 AbstractCegarLoop]: Abstraction has 686 states and 710 transitions. [2020-07-17 18:17:12,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-17 18:17:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 710 transitions. [2020-07-17 18:17:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2020-07-17 18:17:12,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:17:12,924 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:17:12,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-07-17 18:17:12,924 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:17:12,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:17:12,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1803386631, now seen corresponding path program 70 times [2020-07-17 18:17:12,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:17:12,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237943413] [2020-07-17 18:17:12,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:17:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 6394 proven. 6302 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-07-17 18:17:24,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237943413] [2020-07-17 18:17:24,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:17:24,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-07-17 18:17:24,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861563437] [2020-07-17 18:17:24,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-07-17 18:17:24,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:17:24,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-07-17 18:17:24,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=6959, Unknown=0, NotChecked=0, Total=9312 [2020-07-17 18:17:24,217 INFO L87 Difference]: Start difference. First operand 686 states and 710 transitions. Second operand 97 states. [2020-07-17 18:17:44,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:17:44,415 INFO L93 Difference]: Finished difference Result 1362 states and 1527 transitions. [2020-07-17 18:17:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2020-07-17 18:17:44,415 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 764 [2020-07-17 18:17:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:17:44,417 INFO L225 Difference]: With dead ends: 1362 [2020-07-17 18:17:44,417 INFO L226 Difference]: Without dead ends: 1071 [2020-07-17 18:17:44,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=11471, Invalid=24819, Unknown=0, NotChecked=0, Total=36290 [2020-07-17 18:17:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2020-07-17 18:17:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 692. [2020-07-17 18:17:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-07-17 18:17:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 716 transitions. [2020-07-17 18:17:44,512 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 716 transitions. Word has length 764 [2020-07-17 18:17:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:17:44,512 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 716 transitions. [2020-07-17 18:17:44,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-07-17 18:17:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 716 transitions. [2020-07-17 18:17:44,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2020-07-17 18:17:44,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:17:44,517 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:17:44,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-07-17 18:17:44,517 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:17:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:17:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash 647293711, now seen corresponding path program 71 times [2020-07-17 18:17:44,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:17:44,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851174510] [2020-07-17 18:17:44,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:17:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17114 backedges. 6672 proven. 6302 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-07-17 18:17:49,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851174510] [2020-07-17 18:17:49,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:17:49,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-07-17 18:17:49,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300917804] [2020-07-17 18:17:49,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-17 18:17:49,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:17:49,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-17 18:17:49,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 18:17:49,397 INFO L87 Difference]: Start difference. First operand 692 states and 716 transitions. Second operand 52 states. [2020-07-17 18:17:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:17:51,253 INFO L93 Difference]: Finished difference Result 715 states and 740 transitions. [2020-07-17 18:17:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-17 18:17:51,257 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 770 [2020-07-17 18:17:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:17:51,259 INFO L225 Difference]: With dead ends: 715 [2020-07-17 18:17:51,259 INFO L226 Difference]: Without dead ends: 713 [2020-07-17 18:17:51,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2020-07-17 18:17:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-07-17 18:17:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 708. [2020-07-17 18:17:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-07-17 18:17:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 733 transitions. [2020-07-17 18:17:51,358 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 733 transitions. Word has length 770 [2020-07-17 18:17:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:17:51,358 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 733 transitions. [2020-07-17 18:17:51,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-17 18:17:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 733 transitions. [2020-07-17 18:17:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2020-07-17 18:17:51,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:17:51,363 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:17:51,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-07-17 18:17:51,363 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:17:51,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:17:51,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1265631531, now seen corresponding path program 72 times [2020-07-17 18:17:51,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:17:51,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274011144] [2020-07-17 18:17:51,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:17:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18052 backedges. 6960 proven. 6580 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-07-17 18:18:03,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274011144] [2020-07-17 18:18:03,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:18:03,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-07-17 18:18:03,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007417451] [2020-07-17 18:18:03,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-07-17 18:18:03,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:18:03,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-07-17 18:18:03,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-07-17 18:18:03,289 INFO L87 Difference]: Start difference. First operand 708 states and 733 transitions. Second operand 100 states. [2020-07-17 18:18:26,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:18:26,283 INFO L93 Difference]: Finished difference Result 1404 states and 1573 transitions. [2020-07-17 18:18:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-07-17 18:18:26,286 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 790 [2020-07-17 18:18:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:18:26,291 INFO L225 Difference]: With dead ends: 1404 [2020-07-17 18:18:26,291 INFO L226 Difference]: Without dead ends: 1101 [2020-07-17 18:18:26,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-07-17 18:18:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-07-17 18:18:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 714. [2020-07-17 18:18:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2020-07-17 18:18:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 739 transitions. [2020-07-17 18:18:26,481 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 739 transitions. Word has length 790 [2020-07-17 18:18:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:18:26,482 INFO L479 AbstractCegarLoop]: Abstraction has 714 states and 739 transitions. [2020-07-17 18:18:26,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-07-17 18:18:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 739 transitions. [2020-07-17 18:18:26,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2020-07-17 18:18:26,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:18:26,492 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:18:26,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-07-17 18:18:26,492 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:18:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:18:26,493 INFO L82 PathProgramCache]: Analyzing trace with hash -983502029, now seen corresponding path program 73 times [2020-07-17 18:18:26,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:18:26,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968027665] [2020-07-17 18:18:26,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:18:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 6960 proven. 6864 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-07-17 18:18:39,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968027665] [2020-07-17 18:18:39,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:18:39,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-07-17 18:18:39,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670186997] [2020-07-17 18:18:39,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-17 18:18:39,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:18:39,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-17 18:18:39,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2551, Invalid=7549, Unknown=0, NotChecked=0, Total=10100 [2020-07-17 18:18:39,449 INFO L87 Difference]: Start difference. First operand 714 states and 739 transitions. Second operand 101 states. [2020-07-17 18:19:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:19:04,343 INFO L93 Difference]: Finished difference Result 1418 states and 1590 transitions. [2020-07-17 18:19:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2020-07-17 18:19:04,344 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 796 [2020-07-17 18:19:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:19:04,346 INFO L225 Difference]: With dead ends: 1418 [2020-07-17 18:19:04,346 INFO L226 Difference]: Without dead ends: 1115 [2020-07-17 18:19:04,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=12449, Invalid=26953, Unknown=0, NotChecked=0, Total=39402 [2020-07-17 18:19:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-07-17 18:19:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 720. [2020-07-17 18:19:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-07-17 18:19:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 745 transitions. [2020-07-17 18:19:04,491 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 745 transitions. Word has length 796 [2020-07-17 18:19:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:19:04,492 INFO L479 AbstractCegarLoop]: Abstraction has 720 states and 745 transitions. [2020-07-17 18:19:04,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-17 18:19:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 745 transitions. [2020-07-17 18:19:04,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2020-07-17 18:19:04,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:19:04,497 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:19:04,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-07-17 18:19:04,497 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:19:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:19:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1451638587, now seen corresponding path program 74 times [2020-07-17 18:19:04,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:19:04,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211844416] [2020-07-17 18:19:04,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:19:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18626 backedges. 7250 proven. 6864 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-07-17 18:19:09,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211844416] [2020-07-17 18:19:09,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:19:09,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-07-17 18:19:09,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845456942] [2020-07-17 18:19:09,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-17 18:19:09,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:19:09,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-17 18:19:09,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 18:19:09,965 INFO L87 Difference]: Start difference. First operand 720 states and 745 transitions. Second operand 54 states. [2020-07-17 18:19:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:19:11,812 INFO L93 Difference]: Finished difference Result 743 states and 769 transitions. [2020-07-17 18:19:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-17 18:19:11,816 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 802 [2020-07-17 18:19:11,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:19:11,819 INFO L225 Difference]: With dead ends: 743 [2020-07-17 18:19:11,819 INFO L226 Difference]: Without dead ends: 741 [2020-07-17 18:19:11,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 18:19:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-07-17 18:19:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 736. [2020-07-17 18:19:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-07-17 18:19:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 762 transitions. [2020-07-17 18:19:12,011 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 762 transitions. Word has length 802 [2020-07-17 18:19:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:19:12,013 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 762 transitions. [2020-07-17 18:19:12,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-17 18:19:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 762 transitions. [2020-07-17 18:19:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2020-07-17 18:19:12,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:19:12,022 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:19:12,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-07-17 18:19:12,022 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:19:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:19:12,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1941538647, now seen corresponding path program 75 times [2020-07-17 18:19:12,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:19:12,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024390964] [2020-07-17 18:19:12,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:19:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 19604 backedges. 7550 proven. 7154 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-07-17 18:19:26,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024390964] [2020-07-17 18:19:26,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:19:26,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-07-17 18:19:26,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33047938] [2020-07-17 18:19:26,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-07-17 18:19:26,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:19:26,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-07-17 18:19:26,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-07-17 18:19:26,036 INFO L87 Difference]: Start difference. First operand 736 states and 762 transitions. Second operand 104 states. [2020-07-17 18:19:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:19:52,892 INFO L93 Difference]: Finished difference Result 1460 states and 1636 transitions. [2020-07-17 18:19:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2020-07-17 18:19:52,895 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 822 [2020-07-17 18:19:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:19:52,899 INFO L225 Difference]: With dead ends: 1460 [2020-07-17 18:19:52,899 INFO L226 Difference]: Without dead ends: 1145 [2020-07-17 18:19:52,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-07-17 18:19:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2020-07-17 18:19:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 742. [2020-07-17 18:19:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2020-07-17 18:19:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 768 transitions. [2020-07-17 18:19:53,060 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 768 transitions. Word has length 822 [2020-07-17 18:19:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:19:53,060 INFO L479 AbstractCegarLoop]: Abstraction has 742 states and 768 transitions. [2020-07-17 18:19:53,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-07-17 18:19:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 768 transitions. [2020-07-17 18:19:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2020-07-17 18:19:53,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:19:53,066 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:19:53,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-07-17 18:19:53,066 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:19:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:19:53,067 INFO L82 PathProgramCache]: Analyzing trace with hash 203446623, now seen corresponding path program 76 times [2020-07-17 18:19:53,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:19:53,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20078236] [2020-07-17 18:19:53,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:19:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 7550 proven. 7450 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-07-17 18:20:07,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20078236] [2020-07-17 18:20:07,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:20:07,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2020-07-17 18:20:07,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616510847] [2020-07-17 18:20:07,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-07-17 18:20:07,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:20:07,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-07-17 18:20:07,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2757, Invalid=8163, Unknown=0, NotChecked=0, Total=10920 [2020-07-17 18:20:07,697 INFO L87 Difference]: Start difference. First operand 742 states and 768 transitions. Second operand 105 states. [2020-07-17 18:20:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:20:37,122 INFO L93 Difference]: Finished difference Result 1474 states and 1653 transitions. [2020-07-17 18:20:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-07-17 18:20:37,122 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 828 [2020-07-17 18:20:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:20:37,125 INFO L225 Difference]: With dead ends: 1474 [2020-07-17 18:20:37,125 INFO L226 Difference]: Without dead ends: 1159 [2020-07-17 18:20:37,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=13467, Invalid=29175, Unknown=0, NotChecked=0, Total=42642 [2020-07-17 18:20:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2020-07-17 18:20:37,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 748. [2020-07-17 18:20:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2020-07-17 18:20:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 774 transitions. [2020-07-17 18:20:37,322 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 774 transitions. Word has length 828 [2020-07-17 18:20:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:20:37,322 INFO L479 AbstractCegarLoop]: Abstraction has 748 states and 774 transitions. [2020-07-17 18:20:37,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-07-17 18:20:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 774 transitions. [2020-07-17 18:20:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-07-17 18:20:37,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:20:37,332 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:20:37,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-07-17 18:20:37,332 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:20:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:20:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1009547929, now seen corresponding path program 77 times [2020-07-17 18:20:37,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:20:37,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195458554] [2020-07-17 18:20:37,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:20:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20202 backedges. 7852 proven. 7450 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-07-17 18:20:43,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195458554] [2020-07-17 18:20:43,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:20:43,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-07-17 18:20:43,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66278174] [2020-07-17 18:20:43,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-17 18:20:43,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:20:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-17 18:20:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 18:20:43,171 INFO L87 Difference]: Start difference. First operand 748 states and 774 transitions. Second operand 56 states. [2020-07-17 18:20:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:20:45,185 INFO L93 Difference]: Finished difference Result 771 states and 798 transitions. [2020-07-17 18:20:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-17 18:20:45,189 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 834 [2020-07-17 18:20:45,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:20:45,192 INFO L225 Difference]: With dead ends: 771 [2020-07-17 18:20:45,193 INFO L226 Difference]: Without dead ends: 769 [2020-07-17 18:20:45,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2020-07-17 18:20:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2020-07-17 18:20:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 764. [2020-07-17 18:20:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-07-17 18:20:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 791 transitions. [2020-07-17 18:20:45,396 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 791 transitions. Word has length 834 [2020-07-17 18:20:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:20:45,397 INFO L479 AbstractCegarLoop]: Abstraction has 764 states and 791 transitions. [2020-07-17 18:20:45,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-17 18:20:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 791 transitions. [2020-07-17 18:20:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 855 [2020-07-17 18:20:45,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:20:45,406 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 52, 52, 52, 52, 52, 52, 52, 52, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:20:45,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-07-17 18:20:45,407 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:20:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:20:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 905052035, now seen corresponding path program 78 times [2020-07-17 18:20:45,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:20:45,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508468190] [2020-07-17 18:20:45,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:20:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21220 backedges. 8164 proven. 7752 refuted. 0 times theorem prover too weak. 5304 trivial. 0 not checked. [2020-07-17 18:21:01,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508468190] [2020-07-17 18:21:01,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:21:01,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2020-07-17 18:21:01,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016843729] [2020-07-17 18:21:01,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-07-17 18:21:01,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:21:01,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-07-17 18:21:01,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-07-17 18:21:01,512 INFO L87 Difference]: Start difference. First operand 764 states and 791 transitions. Second operand 108 states.