/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:01:55,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:01:55,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:01:55,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-07 14:01:55,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:01:55,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:01:55,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:01:55,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:01:55,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:01:55,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:01:55,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:01:55,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:01:55,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:01:55,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:01:55,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:01:55,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:01:55,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:01:55,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:01:55,356 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:01:55,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:01:55,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:01:55,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:01:55,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:01:55,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:01:55,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:01:55,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:01:55,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:01:55,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:01:55,361 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:01:55,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:01:55,361 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:01:55,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:01:55,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:01:55,362 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:01:55,362 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:01:55,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:01:55,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:01:55,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:01:55,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:01:55,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:01:55,364 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:01:55,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:01:55,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:01:55,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:01:55,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:01:55,739 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:01:55,739 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2020-07-07 14:01:55,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0200d489/c227c9b1c1b040d88a61bb4221324e95/FLAG85da20b84 [2020-07-07 14:01:56,269 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:01:56,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i [2020-07-07 14:01:56,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0200d489/c227c9b1c1b040d88a61bb4221324e95/FLAG85da20b84 [2020-07-07 14:01:56,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0200d489/c227c9b1c1b040d88a61bb4221324e95 [2020-07-07 14:01:56,661 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:01:56,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:01:56,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:56,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:01:56,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:01:56,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:56" (1/1) ... [2020-07-07 14:01:56,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102d8181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56, skipping insertion in model container [2020-07-07 14:01:56,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:56" (1/1) ... [2020-07-07 14:01:56,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:01:56,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:01:56,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:56,879 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:01:56,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:56,912 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:01:56,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56 WrapperNode [2020-07-07 14:01:56,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:56,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:01:56,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:01:56,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:01:56,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56" (1/1) ... [2020-07-07 14:01:56,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56" (1/1) ... [2020-07-07 14:01:56,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56" (1/1) ... [2020-07-07 14:01:56,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56" (1/1) ... [2020-07-07 14:01:56,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56" (1/1) ... [2020-07-07 14:01:56,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56" (1/1) ... [2020-07-07 14:01:56,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56" (1/1) ... [2020-07-07 14:01:57,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:01:57,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:01:57,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:01:57,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:01:57,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56" (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 [2020-07-07 14:01:57,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:01:57,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:01:57,111 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:01:57,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:01:57,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:01:57,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:01:57,112 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:01:57,112 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:01:57,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:01:57,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:01:57,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:01:57,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:01:57,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:01:57,293 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:01:57,293 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 14:01:57,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:57 BoogieIcfgContainer [2020-07-07 14:01:57,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:01:57,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:01:57,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:01:57,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:01:57,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:01:56" (1/3) ... [2020-07-07 14:01:57,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8c13b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:57, skipping insertion in model container [2020-07-07 14:01:57,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:56" (2/3) ... [2020-07-07 14:01:57,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8c13b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:57, skipping insertion in model container [2020-07-07 14:01:57,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:57" (3/3) ... [2020-07-07 14:01:57,305 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2020-07-07 14:01:57,316 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:01:57,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:01:57,338 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:01:57,360 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:01:57,360 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:01:57,361 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:01:57,361 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:01:57,361 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:01:57,361 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:01:57,361 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:01:57,361 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:01:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-07 14:01:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-07 14:01:57,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:57,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:57,385 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:57,392 INFO L82 PathProgramCache]: Analyzing trace with hash 574813456, now seen corresponding path program 1 times [2020-07-07 14:01:57,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:57,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710446729] [2020-07-07 14:01:57,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:57,539 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:57,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710446729] [2020-07-07 14:01:57,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:57,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 14:01:57,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9135572] [2020-07-07 14:01:57,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 14:01:57,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 14:01:57,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 14:01:57,567 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-07-07 14:01:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:57,629 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-07-07 14:01:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 14:01:57,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-07 14:01:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:57,641 INFO L225 Difference]: With dead ends: 37 [2020-07-07 14:01:57,641 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 14:01:57,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 14:01:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 14:01:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-07-07 14:01:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-07 14:01:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-07-07 14:01:57,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-07-07 14:01:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:57,698 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-07-07 14:01:57,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 14:01:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-07 14:01:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 14:01:57,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:57,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:57,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:01:57,702 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:57,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:57,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1625616653, now seen corresponding path program 1 times [2020-07-07 14:01:57,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:57,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794127748] [2020-07-07 14:01:57,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:01:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:00,021 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:00,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794127748] [2020-07-07 14:02:00,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:00,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:02:00,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599222696] [2020-07-07 14:02:00,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:02:00,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:00,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:02:00,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:02:00,025 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-07-07 14:02:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:00,098 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-07-07 14:02:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 14:02:00,099 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-07-07 14:02:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:00,101 INFO L225 Difference]: With dead ends: 27 [2020-07-07 14:02:00,101 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 14:02:00,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:02:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 14:02:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-07-07 14:02:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-07 14:02:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-07 14:02:00,110 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2020-07-07 14:02:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:00,111 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-07 14:02:00,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:02:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-07 14:02:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 14:02:00,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:00,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:00,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:02:00,113 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:00,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1174316682, now seen corresponding path program 2 times [2020-07-07 14:02:00,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:00,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34909204] [2020-07-07 14:02:00,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:02,363 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:02,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34909204] [2020-07-07 14:02:02,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:02,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:02:02,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140681802] [2020-07-07 14:02:02,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:02:02,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:02,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:02:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:02:02,366 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2020-07-07 14:02:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:02,440 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-07-07 14:02:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:02:02,441 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-07-07 14:02:02,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:02,442 INFO L225 Difference]: With dead ends: 31 [2020-07-07 14:02:02,442 INFO L226 Difference]: Without dead ends: 26 [2020-07-07 14:02:02,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:02:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-07 14:02:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-07-07 14:02:02,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 14:02:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-07-07 14:02:02,451 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-07-07 14:02:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:02,451 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-07-07 14:02:02,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:02:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-07-07 14:02:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 14:02:02,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:02,453 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:02,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:02:02,453 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:02,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:02,454 INFO L82 PathProgramCache]: Analyzing trace with hash -199797369, now seen corresponding path program 3 times [2020-07-07 14:02:02,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:02,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121033550] [2020-07-07 14:02:02,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:04,797 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:04,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121033550] [2020-07-07 14:02:04,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:04,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 14:02:04,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682901967] [2020-07-07 14:02:04,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 14:02:04,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:04,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 14:02:04,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:02:04,800 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 15 states. [2020-07-07 14:02:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:04,876 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-07-07 14:02:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:02:04,877 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-07-07 14:02:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:04,878 INFO L225 Difference]: With dead ends: 35 [2020-07-07 14:02:04,878 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 14:02:04,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:02:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 14:02:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-07 14:02:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 14:02:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-07-07 14:02:04,886 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23 [2020-07-07 14:02:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:04,887 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-07-07 14:02:04,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 14:02:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-07-07 14:02:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 14:02:04,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:04,888 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:04,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:02:04,889 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:04,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2014723588, now seen corresponding path program 4 times [2020-07-07 14:02:04,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:04,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143195955] [2020-07-07 14:02:04,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:07,261 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:07,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143195955] [2020-07-07 14:02:07,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:07,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-07 14:02:07,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254733469] [2020-07-07 14:02:07,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 14:02:07,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:07,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 14:02:07,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:02:07,264 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 18 states. [2020-07-07 14:02:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:07,353 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-07-07 14:02:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:02:07,359 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-07-07 14:02:07,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:07,360 INFO L225 Difference]: With dead ends: 39 [2020-07-07 14:02:07,360 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 14:02:07,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:02:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 14:02:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-07 14:02:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 14:02:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-07-07 14:02:07,372 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2020-07-07 14:02:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:07,373 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-07-07 14:02:07,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 14:02:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-07-07 14:02:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 14:02:07,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:07,375 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:07,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:02:07,376 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1723686911, now seen corresponding path program 5 times [2020-07-07 14:02:07,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:07,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807252870] [2020-07-07 14:02:07,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:09,812 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:09,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807252870] [2020-07-07 14:02:09,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:09,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-07-07 14:02:09,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590482186] [2020-07-07 14:02:09,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 14:02:09,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:09,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 14:02:09,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2020-07-07 14:02:09,816 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 21 states. [2020-07-07 14:02:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:09,930 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-07-07 14:02:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 14:02:09,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-07-07 14:02:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:09,932 INFO L225 Difference]: With dead ends: 43 [2020-07-07 14:02:09,932 INFO L226 Difference]: Without dead ends: 38 [2020-07-07 14:02:09,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2020-07-07 14:02:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-07 14:02:09,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-07-07 14:02:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 14:02:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-07-07 14:02:09,940 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 31 [2020-07-07 14:02:09,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:09,941 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-07-07 14:02:09,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 14:02:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-07-07 14:02:09,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-07 14:02:09,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:09,942 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:09,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:02:09,943 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:09,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1455178882, now seen corresponding path program 6 times [2020-07-07 14:02:09,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:09,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457308477] [2020-07-07 14:02:09,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:12,428 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:12,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457308477] [2020-07-07 14:02:12,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:12,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-07-07 14:02:12,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156153086] [2020-07-07 14:02:12,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 14:02:12,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:12,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 14:02:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2020-07-07 14:02:12,434 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 24 states. [2020-07-07 14:02:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:12,557 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-07-07 14:02:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 14:02:12,563 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-07-07 14:02:12,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:12,564 INFO L225 Difference]: With dead ends: 47 [2020-07-07 14:02:12,564 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 14:02:12,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2020-07-07 14:02:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 14:02:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-07-07 14:02:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-07 14:02:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-07-07 14:02:12,572 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 35 [2020-07-07 14:02:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:12,573 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-07-07 14:02:12,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 14:02:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-07-07 14:02:12,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 14:02:12,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:12,574 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:12,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 14:02:12,574 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:12,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1411436667, now seen corresponding path program 7 times [2020-07-07 14:02:12,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:12,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37568011] [2020-07-07 14:02:12,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:15,136 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:15,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37568011] [2020-07-07 14:02:15,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:15,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-07-07 14:02:15,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447877672] [2020-07-07 14:02:15,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-07 14:02:15,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:15,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-07 14:02:15,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-07-07 14:02:15,139 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 27 states. [2020-07-07 14:02:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:15,267 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-07-07 14:02:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 14:02:15,268 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 39 [2020-07-07 14:02:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:15,269 INFO L225 Difference]: With dead ends: 51 [2020-07-07 14:02:15,269 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 14:02:15,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-07-07 14:02:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 14:02:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-07 14:02:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-07 14:02:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-07-07 14:02:15,277 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 39 [2020-07-07 14:02:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:15,277 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-07-07 14:02:15,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-07 14:02:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-07-07 14:02:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 14:02:15,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:15,279 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:15,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 14:02:15,279 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:15,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1883315960, now seen corresponding path program 8 times [2020-07-07 14:02:15,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:15,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722827835] [2020-07-07 14:02:15,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:17,927 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:17,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722827835] [2020-07-07 14:02:17,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:17,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-07-07 14:02:17,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68345736] [2020-07-07 14:02:17,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-07 14:02:17,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:17,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-07 14:02:17,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:02:17,930 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 30 states. [2020-07-07 14:02:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:18,062 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-07-07 14:02:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-07 14:02:18,063 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 43 [2020-07-07 14:02:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:18,064 INFO L225 Difference]: With dead ends: 55 [2020-07-07 14:02:18,064 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 14:02:18,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:02:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 14:02:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-07 14:02:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 14:02:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-07-07 14:02:18,076 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 43 [2020-07-07 14:02:18,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:18,078 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-07-07 14:02:18,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-07 14:02:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-07-07 14:02:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-07 14:02:18,079 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:18,079 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:18,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 14:02:18,079 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:18,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:18,080 INFO L82 PathProgramCache]: Analyzing trace with hash -831789323, now seen corresponding path program 9 times [2020-07-07 14:02:18,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:18,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232353685] [2020-07-07 14:02:18,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:20,854 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:20,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232353685] [2020-07-07 14:02:20,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:20,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-07-07 14:02:20,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144414449] [2020-07-07 14:02:20,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-07 14:02:20,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:20,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-07 14:02:20,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=812, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 14:02:20,859 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 33 states. [2020-07-07 14:02:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:21,015 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-07-07 14:02:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 14:02:21,016 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 47 [2020-07-07 14:02:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:21,017 INFO L225 Difference]: With dead ends: 59 [2020-07-07 14:02:21,017 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 14:02:21,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=812, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 14:02:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 14:02:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-07 14:02:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 14:02:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-07-07 14:02:21,032 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 47 [2020-07-07 14:02:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:21,033 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-07-07 14:02:21,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-07 14:02:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-07-07 14:02:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 14:02:21,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:21,037 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:21,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 14:02:21,038 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash 164128882, now seen corresponding path program 10 times [2020-07-07 14:02:21,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:21,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558411162] [2020-07-07 14:02:21,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:23,931 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:23,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558411162] [2020-07-07 14:02:23,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:23,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-07-07 14:02:23,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053275471] [2020-07-07 14:02:23,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-07 14:02:23,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:23,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-07 14:02:23,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 14:02:23,934 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 36 states. [2020-07-07 14:02:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:24,081 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-07-07 14:02:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-07 14:02:24,082 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2020-07-07 14:02:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:24,083 INFO L225 Difference]: With dead ends: 63 [2020-07-07 14:02:24,084 INFO L226 Difference]: Without dead ends: 58 [2020-07-07 14:02:24,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 14:02:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-07 14:02:24,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-07-07 14:02:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-07 14:02:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-07-07 14:02:24,092 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 51 [2020-07-07 14:02:24,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:24,092 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-07-07 14:02:24,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-07 14:02:24,093 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-07-07 14:02:24,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 14:02:24,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:24,094 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:24,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 14:02:24,094 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1474159471, now seen corresponding path program 11 times [2020-07-07 14:02:24,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:24,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850622952] [2020-07-07 14:02:24,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:27,069 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:27,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850622952] [2020-07-07 14:02:27,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:27,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-07-07 14:02:27,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011267712] [2020-07-07 14:02:27,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-07 14:02:27,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:27,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-07 14:02:27,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1129, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 14:02:27,073 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 39 states. [2020-07-07 14:02:27,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:27,264 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-07-07 14:02:27,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-07 14:02:27,265 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 55 [2020-07-07 14:02:27,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:27,266 INFO L225 Difference]: With dead ends: 67 [2020-07-07 14:02:27,266 INFO L226 Difference]: Without dead ends: 62 [2020-07-07 14:02:27,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 6 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=431, Invalid=1129, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 14:02:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-07 14:02:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-07-07 14:02:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 14:02:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-07-07 14:02:27,273 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 55 [2020-07-07 14:02:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:27,274 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-07-07 14:02:27,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-07 14:02:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-07-07 14:02:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-07 14:02:27,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:27,275 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:27,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 14:02:27,275 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1486067692, now seen corresponding path program 12 times [2020-07-07 14:02:27,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:27,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416516604] [2020-07-07 14:02:27,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:30,431 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:30,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416516604] [2020-07-07 14:02:30,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:30,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-07-07 14:02:30,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360295102] [2020-07-07 14:02:30,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-07 14:02:30,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-07 14:02:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=1307, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:02:30,434 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 42 states. [2020-07-07 14:02:30,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:30,610 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-07-07 14:02:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 14:02:30,611 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 59 [2020-07-07 14:02:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:30,612 INFO L225 Difference]: With dead ends: 71 [2020-07-07 14:02:30,612 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 14:02:30,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=499, Invalid=1307, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:02:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 14:02:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-07-07 14:02:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-07 14:02:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-07-07 14:02:30,634 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 59 [2020-07-07 14:02:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:30,637 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-07-07 14:02:30,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-07 14:02:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-07-07 14:02:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-07 14:02:30,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:30,639 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:30,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 14:02:30,643 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:30,643 INFO L82 PathProgramCache]: Analyzing trace with hash -433011223, now seen corresponding path program 13 times [2020-07-07 14:02:30,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:30,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259566235] [2020-07-07 14:02:30,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:33,967 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:33,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259566235] [2020-07-07 14:02:33,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:33,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-07-07 14:02:33,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827930416] [2020-07-07 14:02:33,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-07 14:02:33,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:33,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-07 14:02:33,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 14:02:33,971 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 45 states. [2020-07-07 14:02:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:34,154 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-07-07 14:02:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-07 14:02:34,155 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 63 [2020-07-07 14:02:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:34,156 INFO L225 Difference]: With dead ends: 75 [2020-07-07 14:02:34,156 INFO L226 Difference]: Without dead ends: 70 [2020-07-07 14:02:34,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 6 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 14:02:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-07 14:02:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-07-07 14:02:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-07 14:02:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-07-07 14:02:34,166 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 63 [2020-07-07 14:02:34,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:34,167 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-07-07 14:02:34,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-07 14:02:34,167 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-07-07 14:02:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 14:02:34,168 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:34,168 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:34,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 14:02:34,169 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:34,169 INFO L82 PathProgramCache]: Analyzing trace with hash -446911130, now seen corresponding path program 14 times [2020-07-07 14:02:34,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:34,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954039515] [2020-07-07 14:02:34,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:37,568 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:37,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954039515] [2020-07-07 14:02:37,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:37,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-07-07 14:02:37,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137328691] [2020-07-07 14:02:37,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-07 14:02:37,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:37,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-07 14:02:37,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=1702, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 14:02:37,572 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 48 states. [2020-07-07 14:02:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:37,792 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-07-07 14:02:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-07 14:02:37,793 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 67 [2020-07-07 14:02:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:37,794 INFO L225 Difference]: With dead ends: 79 [2020-07-07 14:02:37,794 INFO L226 Difference]: Without dead ends: 74 [2020-07-07 14:02:37,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 6 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=650, Invalid=1702, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 14:02:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-07 14:02:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-07-07 14:02:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 14:02:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-07-07 14:02:37,803 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 67 [2020-07-07 14:02:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:37,804 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-07-07 14:02:37,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-07 14:02:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-07-07 14:02:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-07 14:02:37,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:37,805 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:37,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 14:02:37,806 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:37,806 INFO L82 PathProgramCache]: Analyzing trace with hash 354324067, now seen corresponding path program 15 times [2020-07-07 14:02:37,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:37,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123927371] [2020-07-07 14:02:37,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:41,355 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:41,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123927371] [2020-07-07 14:02:41,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:41,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-07-07 14:02:41,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329727953] [2020-07-07 14:02:41,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-07 14:02:41,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:41,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-07 14:02:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1919, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 14:02:41,358 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 51 states. [2020-07-07 14:02:41,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:41,601 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-07-07 14:02:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-07 14:02:41,602 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 71 [2020-07-07 14:02:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:41,603 INFO L225 Difference]: With dead ends: 83 [2020-07-07 14:02:41,603 INFO L226 Difference]: Without dead ends: 78 [2020-07-07 14:02:41,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 6 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=733, Invalid=1919, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 14:02:41,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-07 14:02:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-07-07 14:02:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-07 14:02:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-07-07 14:02:41,612 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 71 [2020-07-07 14:02:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:41,612 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-07-07 14:02:41,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-07 14:02:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-07-07 14:02:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-07 14:02:41,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:41,614 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:41,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 14:02:41,614 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash -555898656, now seen corresponding path program 16 times [2020-07-07 14:02:41,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:41,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203277805] [2020-07-07 14:02:41,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:45,345 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:45,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203277805] [2020-07-07 14:02:45,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:45,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-07-07 14:02:45,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501599194] [2020-07-07 14:02:45,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-07 14:02:45,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:45,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-07 14:02:45,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=2149, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 14:02:45,349 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 54 states. [2020-07-07 14:02:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:45,610 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-07-07 14:02:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-07 14:02:45,611 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 75 [2020-07-07 14:02:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:45,612 INFO L225 Difference]: With dead ends: 87 [2020-07-07 14:02:45,612 INFO L226 Difference]: Without dead ends: 82 [2020-07-07 14:02:45,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 6 SyntacticMatches, 17 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=821, Invalid=2149, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 14:02:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-07 14:02:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-07-07 14:02:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-07 14:02:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-07-07 14:02:45,628 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 75 [2020-07-07 14:02:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:45,632 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-07-07 14:02:45,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-07 14:02:45,632 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-07-07 14:02:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 14:02:45,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:45,632 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:45,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 14:02:45,633 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:45,633 INFO L82 PathProgramCache]: Analyzing trace with hash 643906781, now seen corresponding path program 17 times [2020-07-07 14:02:45,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:45,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196124183] [2020-07-07 14:02:45,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:49,549 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:49,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196124183] [2020-07-07 14:02:49,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:49,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-07-07 14:02:49,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368125853] [2020-07-07 14:02:49,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-07 14:02:49,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:49,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-07 14:02:49,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=914, Invalid=2392, Unknown=0, NotChecked=0, Total=3306 [2020-07-07 14:02:49,553 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 57 states. [2020-07-07 14:02:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:49,840 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-07-07 14:02:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-07-07 14:02:49,841 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 79 [2020-07-07 14:02:49,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:49,842 INFO L225 Difference]: With dead ends: 91 [2020-07-07 14:02:49,842 INFO L226 Difference]: Without dead ends: 86 [2020-07-07 14:02:49,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 6 SyntacticMatches, 18 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=914, Invalid=2392, Unknown=0, NotChecked=0, Total=3306 [2020-07-07 14:02:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-07 14:02:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-07-07 14:02:49,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-07 14:02:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-07-07 14:02:49,851 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 79 [2020-07-07 14:02:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:49,851 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-07-07 14:02:49,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-07 14:02:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-07-07 14:02:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-07 14:02:49,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:49,852 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:49,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 14:02:49,853 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash 433097306, now seen corresponding path program 18 times [2020-07-07 14:02:49,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:49,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217974913] [2020-07-07 14:02:49,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:54,035 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:54,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217974913] [2020-07-07 14:02:54,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:54,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-07-07 14:02:54,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266051414] [2020-07-07 14:02:54,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-07 14:02:54,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-07 14:02:54,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1012, Invalid=2648, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 14:02:54,039 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 60 states. [2020-07-07 14:02:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:54,326 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-07-07 14:02:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-07 14:02:54,326 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 83 [2020-07-07 14:02:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:54,327 INFO L225 Difference]: With dead ends: 95 [2020-07-07 14:02:54,327 INFO L226 Difference]: Without dead ends: 90 [2020-07-07 14:02:54,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 6 SyntacticMatches, 19 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1012, Invalid=2648, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 14:02:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-07 14:02:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-07-07 14:02:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-07 14:02:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-07-07 14:02:54,333 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 83 [2020-07-07 14:02:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:54,333 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-07-07 14:02:54,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-07 14:02:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-07-07 14:02:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-07 14:02:54,334 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:54,334 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:54,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 14:02:54,335 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash 28496215, now seen corresponding path program 19 times [2020-07-07 14:02:54,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:54,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063390729] [2020-07-07 14:02:54,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:02:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:58,700 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:58,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063390729] [2020-07-07 14:02:58,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:58,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-07-07 14:02:58,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842112091] [2020-07-07 14:02:58,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-07 14:02:58,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:58,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-07 14:02:58,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2020-07-07 14:02:58,704 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 63 states. [2020-07-07 14:02:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:58,930 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-07-07 14:02:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-07-07 14:02:58,932 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 87 [2020-07-07 14:02:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:58,933 INFO L225 Difference]: With dead ends: 99 [2020-07-07 14:02:58,933 INFO L226 Difference]: Without dead ends: 94 [2020-07-07 14:02:58,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 6 SyntacticMatches, 20 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2020-07-07 14:02:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-07 14:02:58,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-07-07 14:02:58,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-07 14:02:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-07-07 14:02:58,939 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 87 [2020-07-07 14:02:58,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:58,940 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-07-07 14:02:58,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-07 14:02:58,940 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-07-07 14:02:58,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 14:02:58,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:58,941 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:58,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 14:02:58,941 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:58,941 INFO L82 PathProgramCache]: Analyzing trace with hash 284119508, now seen corresponding path program 20 times [2020-07-07 14:02:58,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:58,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374982188] [2020-07-07 14:02:58,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:03,505 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:03,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374982188] [2020-07-07 14:03:03,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:03,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-07-07 14:03:03,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543186475] [2020-07-07 14:03:03,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-07-07 14:03:03,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:03,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-07-07 14:03:03,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1223, Invalid=3199, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 14:03:03,509 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 66 states. [2020-07-07 14:03:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:03,836 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-07-07 14:03:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-07 14:03:03,838 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 91 [2020-07-07 14:03:03,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:03,839 INFO L225 Difference]: With dead ends: 103 [2020-07-07 14:03:03,839 INFO L226 Difference]: Without dead ends: 98 [2020-07-07 14:03:03,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 21 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1223, Invalid=3199, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 14:03:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-07 14:03:03,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-07-07 14:03:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-07 14:03:03,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-07-07 14:03:03,844 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 91 [2020-07-07 14:03:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:03,845 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-07-07 14:03:03,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-07-07 14:03:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-07-07 14:03:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-07-07 14:03:03,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:03,846 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:03,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 14:03:03,846 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:03,847 INFO L82 PathProgramCache]: Analyzing trace with hash 885869521, now seen corresponding path program 21 times [2020-07-07 14:03:03,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:03,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126346152] [2020-07-07 14:03:03,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:08,690 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:08,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126346152] [2020-07-07 14:03:08,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:08,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-07-07 14:03:08,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707485113] [2020-07-07 14:03:08,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-07 14:03:08,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-07 14:03:08,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=3494, Unknown=0, NotChecked=0, Total=4830 [2020-07-07 14:03:08,694 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 69 states. [2020-07-07 14:03:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:09,015 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-07-07 14:03:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-07 14:03:09,015 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 95 [2020-07-07 14:03:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:09,017 INFO L225 Difference]: With dead ends: 107 [2020-07-07 14:03:09,017 INFO L226 Difference]: Without dead ends: 102 [2020-07-07 14:03:09,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1336, Invalid=3494, Unknown=0, NotChecked=0, Total=4830 [2020-07-07 14:03:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-07 14:03:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-07-07 14:03:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-07 14:03:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-07-07 14:03:09,023 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 95 [2020-07-07 14:03:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:09,024 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-07-07 14:03:09,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-07 14:03:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-07-07 14:03:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-07 14:03:09,025 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:09,025 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:09,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 14:03:09,026 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:09,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:09,026 INFO L82 PathProgramCache]: Analyzing trace with hash -453771442, now seen corresponding path program 22 times [2020-07-07 14:03:09,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:09,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364319952] [2020-07-07 14:03:09,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:11,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:14,142 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:14,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364319952] [2020-07-07 14:03:14,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:14,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-07-07 14:03:14,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997450200] [2020-07-07 14:03:14,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-07-07 14:03:14,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-07-07 14:03:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1454, Invalid=3802, Unknown=0, NotChecked=0, Total=5256 [2020-07-07 14:03:14,145 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 72 states. [2020-07-07 14:03:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:14,414 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-07-07 14:03:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-07-07 14:03:14,415 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 99 [2020-07-07 14:03:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:14,416 INFO L225 Difference]: With dead ends: 111 [2020-07-07 14:03:14,417 INFO L226 Difference]: Without dead ends: 106 [2020-07-07 14:03:14,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 6 SyntacticMatches, 23 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2406 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1454, Invalid=3802, Unknown=0, NotChecked=0, Total=5256 [2020-07-07 14:03:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-07 14:03:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-07-07 14:03:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-07-07 14:03:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-07-07 14:03:14,424 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 99 [2020-07-07 14:03:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:14,424 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-07-07 14:03:14,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-07-07 14:03:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-07-07 14:03:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-07 14:03:14,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:14,425 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:14,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 14:03:14,426 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash -211112885, now seen corresponding path program 23 times [2020-07-07 14:03:14,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:14,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047989070] [2020-07-07 14:03:14,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:19,828 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:19,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047989070] [2020-07-07 14:03:19,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:19,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-07-07 14:03:19,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693593390] [2020-07-07 14:03:19,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-07 14:03:19,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:19,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-07 14:03:19,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1577, Invalid=4123, Unknown=0, NotChecked=0, Total=5700 [2020-07-07 14:03:19,831 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 75 states. [2020-07-07 14:03:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:20,098 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-07-07 14:03:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-07 14:03:20,099 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 103 [2020-07-07 14:03:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:20,100 INFO L225 Difference]: With dead ends: 115 [2020-07-07 14:03:20,100 INFO L226 Difference]: Without dead ends: 110 [2020-07-07 14:03:20,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 6 SyntacticMatches, 24 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1577, Invalid=4123, Unknown=0, NotChecked=0, Total=5700 [2020-07-07 14:03:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-07 14:03:20,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-07-07 14:03:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-07 14:03:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2020-07-07 14:03:20,106 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 103 [2020-07-07 14:03:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:20,106 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2020-07-07 14:03:20,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-07 14:03:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2020-07-07 14:03:20,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-07 14:03:20,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:20,107 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:20,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-07 14:03:20,107 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:20,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:20,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1553502920, now seen corresponding path program 24 times [2020-07-07 14:03:20,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:20,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894525468] [2020-07-07 14:03:20,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:25,808 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:25,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894525468] [2020-07-07 14:03:25,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:25,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-07-07 14:03:25,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812947325] [2020-07-07 14:03:25,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-07-07 14:03:25,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:25,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-07-07 14:03:25,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1705, Invalid=4457, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 14:03:25,811 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 78 states. [2020-07-07 14:03:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:26,137 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2020-07-07 14:03:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-07-07 14:03:26,138 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 107 [2020-07-07 14:03:26,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:26,139 INFO L225 Difference]: With dead ends: 119 [2020-07-07 14:03:26,139 INFO L226 Difference]: Without dead ends: 114 [2020-07-07 14:03:26,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 25 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1705, Invalid=4457, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 14:03:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-07 14:03:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-07-07 14:03:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-07 14:03:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-07-07 14:03:26,147 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 107 [2020-07-07 14:03:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:26,147 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-07-07 14:03:26,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-07-07 14:03:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-07-07 14:03:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-07-07 14:03:26,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:26,149 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:26,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-07 14:03:26,149 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash 390394565, now seen corresponding path program 25 times [2020-07-07 14:03:26,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:26,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211467263] [2020-07-07 14:03:26,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:32,344 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:32,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211467263] [2020-07-07 14:03:32,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:32,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-07-07 14:03:32,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896066061] [2020-07-07 14:03:32,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-07-07 14:03:32,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:32,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-07-07 14:03:32,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1838, Invalid=4804, Unknown=0, NotChecked=0, Total=6642 [2020-07-07 14:03:32,347 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 81 states. [2020-07-07 14:03:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:32,784 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-07-07 14:03:32,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-07-07 14:03:32,784 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 111 [2020-07-07 14:03:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:32,786 INFO L225 Difference]: With dead ends: 123 [2020-07-07 14:03:32,786 INFO L226 Difference]: Without dead ends: 118 [2020-07-07 14:03:32,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 6 SyntacticMatches, 26 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3108 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1838, Invalid=4804, Unknown=0, NotChecked=0, Total=6642 [2020-07-07 14:03:32,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-07 14:03:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2020-07-07 14:03:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-07 14:03:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-07-07 14:03:32,792 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 111 [2020-07-07 14:03:32,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:32,792 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-07-07 14:03:32,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-07-07 14:03:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-07-07 14:03:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 14:03:32,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:32,793 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:32,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-07 14:03:32,794 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash -459862974, now seen corresponding path program 26 times [2020-07-07 14:03:32,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:32,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813912134] [2020-07-07 14:03:32,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:39,304 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:39,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813912134] [2020-07-07 14:03:39,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:39,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-07-07 14:03:39,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396297643] [2020-07-07 14:03:39,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-07-07 14:03:39,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:39,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-07-07 14:03:39,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1976, Invalid=5164, Unknown=0, NotChecked=0, Total=7140 [2020-07-07 14:03:39,307 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 84 states. [2020-07-07 14:03:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:39,918 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2020-07-07 14:03:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-07-07 14:03:39,920 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 115 [2020-07-07 14:03:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:39,921 INFO L225 Difference]: With dead ends: 127 [2020-07-07 14:03:39,922 INFO L226 Difference]: Without dead ends: 122 [2020-07-07 14:03:39,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 6 SyntacticMatches, 27 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3362 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1976, Invalid=5164, Unknown=0, NotChecked=0, Total=7140 [2020-07-07 14:03:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-07 14:03:39,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-07-07 14:03:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-07 14:03:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2020-07-07 14:03:39,943 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 115 [2020-07-07 14:03:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:39,944 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2020-07-07 14:03:39,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-07-07 14:03:39,944 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2020-07-07 14:03:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-07-07 14:03:39,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:39,946 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:39,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-07 14:03:39,946 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:39,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:39,947 INFO L82 PathProgramCache]: Analyzing trace with hash 538320703, now seen corresponding path program 27 times [2020-07-07 14:03:39,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:39,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208185869] [2020-07-07 14:03:39,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:46,877 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:46,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208185869] [2020-07-07 14:03:46,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:46,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-07-07 14:03:46,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721273813] [2020-07-07 14:03:46,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-07-07 14:03:46,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-07-07 14:03:46,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=5537, Unknown=0, NotChecked=0, Total=7656 [2020-07-07 14:03:46,881 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 87 states. [2020-07-07 14:03:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:47,304 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-07-07 14:03:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-07-07 14:03:47,305 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 119 [2020-07-07 14:03:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:47,306 INFO L225 Difference]: With dead ends: 131 [2020-07-07 14:03:47,306 INFO L226 Difference]: Without dead ends: 126 [2020-07-07 14:03:47,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 6 SyntacticMatches, 28 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2119, Invalid=5537, Unknown=0, NotChecked=0, Total=7656 [2020-07-07 14:03:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-07 14:03:47,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-07-07 14:03:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-07 14:03:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2020-07-07 14:03:47,312 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 119 [2020-07-07 14:03:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:47,313 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2020-07-07 14:03:47,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-07-07 14:03:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2020-07-07 14:03:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-07 14:03:47,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:47,314 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:47,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-07 14:03:47,315 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:47,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1884722244, now seen corresponding path program 28 times [2020-07-07 14:03:47,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:47,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318613769] [2020-07-07 14:03:47,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:55,045 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:55,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318613769] [2020-07-07 14:03:55,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:55,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-07-07 14:03:55,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807916694] [2020-07-07 14:03:55,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-07-07 14:03:55,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:55,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-07-07 14:03:55,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2267, Invalid=5923, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 14:03:55,048 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 90 states. [2020-07-07 14:03:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:55,428 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-07-07 14:03:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-07-07 14:03:55,429 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 123 [2020-07-07 14:03:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:55,430 INFO L225 Difference]: With dead ends: 135 [2020-07-07 14:03:55,431 INFO L226 Difference]: Without dead ends: 130 [2020-07-07 14:03:55,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 6 SyntacticMatches, 29 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3900 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2267, Invalid=5923, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 14:03:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-07-07 14:03:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-07-07 14:03:55,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-07 14:03:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2020-07-07 14:03:55,437 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 123 [2020-07-07 14:03:55,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:55,438 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2020-07-07 14:03:55,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-07-07 14:03:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2020-07-07 14:03:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-07 14:03:55,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:55,439 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:55,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-07 14:03:55,439 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash 865612217, now seen corresponding path program 29 times [2020-07-07 14:03:55,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:55,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543198032] [2020-07-07 14:03:55,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:03:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:57,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:03,238 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:03,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543198032] [2020-07-07 14:04:03,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:03,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-07-07 14:04:03,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75559580] [2020-07-07 14:04:03,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-07-07 14:04:03,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-07-07 14:04:03,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=6322, Unknown=0, NotChecked=0, Total=8742 [2020-07-07 14:04:03,241 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 93 states. [2020-07-07 14:04:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:03,593 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2020-07-07 14:04:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-07-07 14:04:03,594 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 127 [2020-07-07 14:04:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:03,595 INFO L225 Difference]: With dead ends: 139 [2020-07-07 14:04:03,595 INFO L226 Difference]: Without dead ends: 134 [2020-07-07 14:04:03,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 6 SyntacticMatches, 30 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4184 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2420, Invalid=6322, Unknown=0, NotChecked=0, Total=8742 [2020-07-07 14:04:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-07 14:04:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-07-07 14:04:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-07 14:04:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-07-07 14:04:03,603 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 127 [2020-07-07 14:04:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:03,603 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-07-07 14:04:03,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-07-07 14:04:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-07-07 14:04:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-07 14:04:03,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:03,604 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:03,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-07 14:04:03,605 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:03,605 INFO L82 PathProgramCache]: Analyzing trace with hash 378122550, now seen corresponding path program 30 times [2020-07-07 14:04:03,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:03,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333246663] [2020-07-07 14:04:03,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:04:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:12,167 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:12,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333246663] [2020-07-07 14:04:12,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:12,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-07-07 14:04:12,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716916640] [2020-07-07 14:04:12,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-07 14:04:12,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:12,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-07 14:04:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2578, Invalid=6734, Unknown=0, NotChecked=0, Total=9312 [2020-07-07 14:04:12,170 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 96 states. [2020-07-07 14:04:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:12,588 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2020-07-07 14:04:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-07-07 14:04:12,589 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 131 [2020-07-07 14:04:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:12,591 INFO L225 Difference]: With dead ends: 143 [2020-07-07 14:04:12,591 INFO L226 Difference]: Without dead ends: 138 [2020-07-07 14:04:12,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 6 SyntacticMatches, 31 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4478 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2578, Invalid=6734, Unknown=0, NotChecked=0, Total=9312 [2020-07-07 14:04:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-07 14:04:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-07-07 14:04:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-07 14:04:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2020-07-07 14:04:12,600 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 131 [2020-07-07 14:04:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:12,600 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2020-07-07 14:04:12,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-07 14:04:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2020-07-07 14:04:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-07 14:04:12,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:12,601 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:12,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-07 14:04:12,603 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:12,604 INFO L82 PathProgramCache]: Analyzing trace with hash 495266355, now seen corresponding path program 31 times [2020-07-07 14:04:12,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:12,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574411382] [2020-07-07 14:04:12,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:04:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:21,597 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:21,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574411382] [2020-07-07 14:04:21,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:21,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-07-07 14:04:21,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828890042] [2020-07-07 14:04:21,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-07 14:04:21,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:21,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-07 14:04:21,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2741, Invalid=7159, Unknown=0, NotChecked=0, Total=9900 [2020-07-07 14:04:21,601 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 99 states. [2020-07-07 14:04:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:22,228 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2020-07-07 14:04:22,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-07 14:04:22,230 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 135 [2020-07-07 14:04:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:22,231 INFO L225 Difference]: With dead ends: 147 [2020-07-07 14:04:22,231 INFO L226 Difference]: Without dead ends: 142 [2020-07-07 14:04:22,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 6 SyntacticMatches, 32 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4782 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2741, Invalid=7159, Unknown=0, NotChecked=0, Total=9900 [2020-07-07 14:04:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-07 14:04:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-07-07 14:04:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-07 14:04:22,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2020-07-07 14:04:22,238 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 135 [2020-07-07 14:04:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:22,238 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2020-07-07 14:04:22,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-07 14:04:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2020-07-07 14:04:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-07 14:04:22,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:22,240 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:22,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-07 14:04:22,240 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:22,241 INFO L82 PathProgramCache]: Analyzing trace with hash -672015184, now seen corresponding path program 32 times [2020-07-07 14:04:22,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:22,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667673227] [2020-07-07 14:04:22,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:04:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:32,468 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:32,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667673227] [2020-07-07 14:04:32,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:32,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-07-07 14:04:32,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778925708] [2020-07-07 14:04:32,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-07-07 14:04:32,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:32,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-07-07 14:04:32,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2909, Invalid=7597, Unknown=0, NotChecked=0, Total=10506 [2020-07-07 14:04:32,471 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 102 states. [2020-07-07 14:04:33,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:33,048 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-07-07 14:04:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-07-07 14:04:33,049 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 139 [2020-07-07 14:04:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:33,051 INFO L225 Difference]: With dead ends: 151 [2020-07-07 14:04:33,051 INFO L226 Difference]: Without dead ends: 146 [2020-07-07 14:04:33,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 6 SyntacticMatches, 33 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5096 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2909, Invalid=7597, Unknown=0, NotChecked=0, Total=10506 [2020-07-07 14:04:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-07-07 14:04:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-07-07 14:04:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-07 14:04:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2020-07-07 14:04:33,060 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 139 [2020-07-07 14:04:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:33,060 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2020-07-07 14:04:33,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-07-07 14:04:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2020-07-07 14:04:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-07-07 14:04:33,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:33,062 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:33,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-07 14:04:33,062 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:33,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1335298221, now seen corresponding path program 33 times [2020-07-07 14:04:33,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:33,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672919839] [2020-07-07 14:04:33,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.001s / 0.001s total Resizing node table from 13 to 23 [2020-07-07 14:04:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:43,614 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:43,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672919839] [2020-07-07 14:04:43,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:43,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2020-07-07 14:04:43,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603361871] [2020-07-07 14:04:43,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-07-07 14:04:43,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:43,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-07-07 14:04:43,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3082, Invalid=8048, Unknown=0, NotChecked=0, Total=11130 [2020-07-07 14:04:43,618 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 105 states. [2020-07-07 14:04:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:44,082 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2020-07-07 14:04:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-07-07 14:04:44,084 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 143 [2020-07-07 14:04:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:44,085 INFO L225 Difference]: With dead ends: 155 [2020-07-07 14:04:44,086 INFO L226 Difference]: Without dead ends: 150 [2020-07-07 14:04:44,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 6 SyntacticMatches, 34 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5420 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3082, Invalid=8048, Unknown=0, NotChecked=0, Total=11130 [2020-07-07 14:04:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-07 14:04:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-07-07 14:04:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-07 14:04:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2020-07-07 14:04:44,096 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 143 [2020-07-07 14:04:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:44,096 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2020-07-07 14:04:44,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-07-07 14:04:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2020-07-07 14:04:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-07-07 14:04:44,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:44,098 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:44,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-07 14:04:44,099 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:44,099 INFO L82 PathProgramCache]: Analyzing trace with hash -660869590, now seen corresponding path program 34 times [2020-07-07 14:04:44,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:44,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692186587] [2020-07-07 14:04:44,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:04:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:56,006 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:56,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692186587] [2020-07-07 14:04:56,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:56,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2020-07-07 14:04:56,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217207769] [2020-07-07 14:04:56,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-07-07 14:04:56,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:56,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-07-07 14:04:56,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3260, Invalid=8512, Unknown=0, NotChecked=0, Total=11772 [2020-07-07 14:04:56,009 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 108 states. [2020-07-07 14:04:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:56,744 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2020-07-07 14:04:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-07-07 14:04:56,746 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 147 [2020-07-07 14:04:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:56,748 INFO L225 Difference]: With dead ends: 159 [2020-07-07 14:04:56,748 INFO L226 Difference]: Without dead ends: 154 [2020-07-07 14:04:56,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 6 SyntacticMatches, 35 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5754 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3260, Invalid=8512, Unknown=0, NotChecked=0, Total=11772 [2020-07-07 14:04:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-07-07 14:04:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-07-07 14:04:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-07 14:04:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-07-07 14:04:56,756 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 147 [2020-07-07 14:04:56,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:56,757 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-07-07 14:04:56,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-07-07 14:04:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-07-07 14:04:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-07 14:04:56,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:56,758 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:56,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-07 14:04:56,759 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:56,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:56,759 INFO L82 PathProgramCache]: Analyzing trace with hash -511193817, now seen corresponding path program 35 times [2020-07-07 14:04:56,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:56,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58129373] [2020-07-07 14:04:56,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:04:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:10,374 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:10,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58129373] [2020-07-07 14:05:10,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:10,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2020-07-07 14:05:10,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560248714] [2020-07-07 14:05:10,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2020-07-07 14:05:10,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:10,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2020-07-07 14:05:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3443, Invalid=8989, Unknown=0, NotChecked=0, Total=12432 [2020-07-07 14:05:10,378 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 111 states. [2020-07-07 14:05:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:11,248 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-07-07 14:05:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-07-07 14:05:11,249 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 151 [2020-07-07 14:05:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:11,251 INFO L225 Difference]: With dead ends: 163 [2020-07-07 14:05:11,251 INFO L226 Difference]: Without dead ends: 158 [2020-07-07 14:05:11,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 6 SyntacticMatches, 36 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6098 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=3443, Invalid=8989, Unknown=0, NotChecked=0, Total=12432 [2020-07-07 14:05:11,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-07 14:05:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2020-07-07 14:05:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-07 14:05:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2020-07-07 14:05:11,260 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 151 [2020-07-07 14:05:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:11,260 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2020-07-07 14:05:11,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 111 states. [2020-07-07 14:05:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2020-07-07 14:05:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-07-07 14:05:11,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:11,262 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:11,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-07 14:05:11,262 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:11,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1019091548, now seen corresponding path program 36 times [2020-07-07 14:05:11,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:11,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236004579] [2020-07-07 14:05:11,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:05:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:26,046 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:26,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236004579] [2020-07-07 14:05:26,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:26,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2020-07-07 14:05:26,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923118392] [2020-07-07 14:05:26,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-07-07 14:05:26,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:26,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-07-07 14:05:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3631, Invalid=9479, Unknown=0, NotChecked=0, Total=13110 [2020-07-07 14:05:26,050 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 114 states. [2020-07-07 14:05:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:27,099 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2020-07-07 14:05:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-07-07 14:05:27,101 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 155 [2020-07-07 14:05:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:27,103 INFO L225 Difference]: With dead ends: 167 [2020-07-07 14:05:27,104 INFO L226 Difference]: Without dead ends: 162 [2020-07-07 14:05:27,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 6 SyntacticMatches, 37 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6452 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3631, Invalid=9479, Unknown=0, NotChecked=0, Total=13110 [2020-07-07 14:05:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-07 14:05:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-07-07 14:05:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-07 14:05:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2020-07-07 14:05:27,115 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 155 [2020-07-07 14:05:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:27,115 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2020-07-07 14:05:27,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-07-07 14:05:27,116 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2020-07-07 14:05:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-07 14:05:27,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:27,117 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:27,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-07 14:05:27,117 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:27,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1861126239, now seen corresponding path program 37 times [2020-07-07 14:05:27,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:27,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812742805] [2020-07-07 14:05:27,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:05:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:44,427 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:44,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812742805] [2020-07-07 14:05:44,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:44,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2020-07-07 14:05:44,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423854443] [2020-07-07 14:05:44,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2020-07-07 14:05:44,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:44,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2020-07-07 14:05:44,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3824, Invalid=9982, Unknown=0, NotChecked=0, Total=13806 [2020-07-07 14:05:44,431 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 117 states. [2020-07-07 14:05:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:45,558 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-07-07 14:05:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-07-07 14:05:45,560 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 159 [2020-07-07 14:05:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:45,562 INFO L225 Difference]: With dead ends: 171 [2020-07-07 14:05:45,562 INFO L226 Difference]: Without dead ends: 166 [2020-07-07 14:05:45,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 6 SyntacticMatches, 38 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6816 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=3824, Invalid=9982, Unknown=0, NotChecked=0, Total=13806 [2020-07-07 14:05:45,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-07 14:05:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-07-07 14:05:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-07 14:05:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2020-07-07 14:05:45,570 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 159 [2020-07-07 14:05:45,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:45,570 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2020-07-07 14:05:45,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 117 states. [2020-07-07 14:05:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2020-07-07 14:05:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-07 14:05:45,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:45,571 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:45,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-07 14:05:45,572 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:45,572 INFO L82 PathProgramCache]: Analyzing trace with hash -392314082, now seen corresponding path program 38 times [2020-07-07 14:05:45,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:45,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462720038] [2020-07-07 14:05:45,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:05:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:03,619 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:03,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462720038] [2020-07-07 14:06:03,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:03,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2020-07-07 14:06:03,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631910981] [2020-07-07 14:06:03,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-07-07 14:06:03,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:03,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-07-07 14:06:03,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4022, Invalid=10498, Unknown=0, NotChecked=0, Total=14520 [2020-07-07 14:06:03,623 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 120 states. [2020-07-07 14:06:04,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:04,805 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2020-07-07 14:06:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-07-07 14:06:04,807 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 163 [2020-07-07 14:06:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:04,809 INFO L225 Difference]: With dead ends: 175 [2020-07-07 14:06:04,810 INFO L226 Difference]: Without dead ends: 170 [2020-07-07 14:06:04,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 6 SyntacticMatches, 39 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7190 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=4022, Invalid=10498, Unknown=0, NotChecked=0, Total=14520 [2020-07-07 14:06:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-07 14:06:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2020-07-07 14:06:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-07 14:06:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2020-07-07 14:06:04,820 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 163 [2020-07-07 14:06:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:04,820 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2020-07-07 14:06:04,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-07-07 14:06:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2020-07-07 14:06:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-07-07 14:06:04,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:04,822 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:04,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-07 14:06:04,823 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:04,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1041364965, now seen corresponding path program 39 times [2020-07-07 14:06:04,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:04,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528775251] [2020-07-07 14:06:04,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:06:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:25,915 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:25,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528775251] [2020-07-07 14:06:25,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:25,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2020-07-07 14:06:25,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339314763] [2020-07-07 14:06:25,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2020-07-07 14:06:25,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:25,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2020-07-07 14:06:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4225, Invalid=11027, Unknown=0, NotChecked=0, Total=15252 [2020-07-07 14:06:25,921 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 123 states. [2020-07-07 14:06:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:27,453 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2020-07-07 14:06:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-07-07 14:06:27,455 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 167 [2020-07-07 14:06:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:27,457 INFO L225 Difference]: With dead ends: 179 [2020-07-07 14:06:27,457 INFO L226 Difference]: Without dead ends: 174 [2020-07-07 14:06:27,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 6 SyntacticMatches, 40 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7574 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=4225, Invalid=11027, Unknown=0, NotChecked=0, Total=15252 [2020-07-07 14:06:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-07 14:06:27,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-07-07 14:06:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-07 14:06:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2020-07-07 14:06:27,468 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 167 [2020-07-07 14:06:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:27,469 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2020-07-07 14:06:27,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 123 states. [2020-07-07 14:06:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2020-07-07 14:06:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-07-07 14:06:27,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:27,471 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:27,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-07 14:06:27,471 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:27,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1063880344, now seen corresponding path program 40 times [2020-07-07 14:06:27,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:27,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763026719] [2020-07-07 14:06:27,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:06:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:51,472 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:51,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763026719] [2020-07-07 14:06:51,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:51,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2020-07-07 14:06:51,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328835601] [2020-07-07 14:06:51,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2020-07-07 14:06:51,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:51,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2020-07-07 14:06:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4433, Invalid=11569, Unknown=0, NotChecked=0, Total=16002 [2020-07-07 14:06:51,475 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 126 states. [2020-07-07 14:06:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:52,510 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2020-07-07 14:06:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-07-07 14:06:52,512 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 171 [2020-07-07 14:06:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:52,513 INFO L225 Difference]: With dead ends: 183 [2020-07-07 14:06:52,513 INFO L226 Difference]: Without dead ends: 178 [2020-07-07 14:06:52,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 6 SyntacticMatches, 41 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7968 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=4433, Invalid=11569, Unknown=0, NotChecked=0, Total=16002 [2020-07-07 14:06:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-07 14:06:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2020-07-07 14:06:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-07 14:06:52,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2020-07-07 14:06:52,528 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 171 [2020-07-07 14:06:52,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:52,528 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2020-07-07 14:06:52,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 126 states. [2020-07-07 14:06:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2020-07-07 14:06:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-07-07 14:06:52,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:52,529 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:52,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-07 14:06:52,530 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2111274645, now seen corresponding path program 41 times [2020-07-07 14:06:52,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:52,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768986938] [2020-07-07 14:06:52,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:06:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:19,031 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:19,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768986938] [2020-07-07 14:07:19,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:19,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2020-07-07 14:07:19,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173512804] [2020-07-07 14:07:19,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2020-07-07 14:07:19,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2020-07-07 14:07:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4646, Invalid=12124, Unknown=0, NotChecked=0, Total=16770 [2020-07-07 14:07:19,036 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 129 states. [2020-07-07 14:07:20,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:07:20,887 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2020-07-07 14:07:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-07-07 14:07:20,890 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 175 [2020-07-07 14:07:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:07:20,892 INFO L225 Difference]: With dead ends: 187 [2020-07-07 14:07:20,892 INFO L226 Difference]: Without dead ends: 182 [2020-07-07 14:07:20,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 6 SyntacticMatches, 42 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8372 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=4646, Invalid=12124, Unknown=0, NotChecked=0, Total=16770 [2020-07-07 14:07:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-07 14:07:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2020-07-07 14:07:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-07 14:07:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2020-07-07 14:07:20,901 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 175 [2020-07-07 14:07:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:20,901 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2020-07-07 14:07:20,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 129 states. [2020-07-07 14:07:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2020-07-07 14:07:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-07-07 14:07:20,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:20,903 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:07:20,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-07 14:07:20,904 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:20,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:20,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1683959826, now seen corresponding path program 42 times [2020-07-07 14:07:20,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:20,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607387537] [2020-07-07 14:07:20,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:07:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:50,629 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:50,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607387537] [2020-07-07 14:07:50,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:50,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2020-07-07 14:07:50,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125255609] [2020-07-07 14:07:50,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2020-07-07 14:07:50,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:50,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2020-07-07 14:07:50,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4864, Invalid=12692, Unknown=0, NotChecked=0, Total=17556 [2020-07-07 14:07:50,635 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 132 states. [2020-07-07 14:07:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:07:52,711 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-07-07 14:07:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-07-07 14:07:52,714 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 179 [2020-07-07 14:07:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:07:52,716 INFO L225 Difference]: With dead ends: 191 [2020-07-07 14:07:52,716 INFO L226 Difference]: Without dead ends: 186 [2020-07-07 14:07:52,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 6 SyntacticMatches, 43 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8786 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=4864, Invalid=12692, Unknown=0, NotChecked=0, Total=17556 [2020-07-07 14:07:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-07 14:07:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-07-07 14:07:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-07 14:07:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2020-07-07 14:07:52,728 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 179 [2020-07-07 14:07:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:52,728 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2020-07-07 14:07:52,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 132 states. [2020-07-07 14:07:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2020-07-07 14:07:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-07-07 14:07:52,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:52,730 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:07:52,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-07 14:07:52,731 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1955060495, now seen corresponding path program 43 times [2020-07-07 14:07:52,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:52,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237716889] [2020-07-07 14:07:52,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:07:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:08:25,370 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:08:25,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237716889] [2020-07-07 14:08:25,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:08:25,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2020-07-07 14:08:25,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104707677] [2020-07-07 14:08:25,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2020-07-07 14:08:25,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:08:25,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2020-07-07 14:08:25,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5087, Invalid=13273, Unknown=0, NotChecked=0, Total=18360 [2020-07-07 14:08:25,376 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand 135 states. [2020-07-07 14:08:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:08:27,366 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2020-07-07 14:08:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-07-07 14:08:27,373 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 183 [2020-07-07 14:08:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:08:27,375 INFO L225 Difference]: With dead ends: 195 [2020-07-07 14:08:27,375 INFO L226 Difference]: Without dead ends: 190 [2020-07-07 14:08:27,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 6 SyntacticMatches, 44 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9210 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=5087, Invalid=13273, Unknown=0, NotChecked=0, Total=18360 [2020-07-07 14:08:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-07 14:08:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-07-07 14:08:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-07 14:08:27,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2020-07-07 14:08:27,391 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 183 [2020-07-07 14:08:27,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:08:27,392 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2020-07-07 14:08:27,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 135 states. [2020-07-07 14:08:27,392 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2020-07-07 14:08:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-07-07 14:08:27,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:27,393 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:27,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-07-07 14:08:27,393 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:27,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:27,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1707556980, now seen corresponding path program 44 times [2020-07-07 14:08:27,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:27,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544294168] [2020-07-07 14:08:27,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:08:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:04,288 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:04,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544294168] [2020-07-07 14:09:04,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:04,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2020-07-07 14:09:04,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353052409] [2020-07-07 14:09:04,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2020-07-07 14:09:04,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:04,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2020-07-07 14:09:04,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5315, Invalid=13867, Unknown=0, NotChecked=0, Total=19182 [2020-07-07 14:09:04,292 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 138 states. [2020-07-07 14:09:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:06,870 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2020-07-07 14:09:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-07-07 14:09:06,874 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 187 [2020-07-07 14:09:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:06,876 INFO L225 Difference]: With dead ends: 199 [2020-07-07 14:09:06,877 INFO L226 Difference]: Without dead ends: 194 [2020-07-07 14:09:06,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 6 SyntacticMatches, 45 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9644 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=5315, Invalid=13867, Unknown=0, NotChecked=0, Total=19182 [2020-07-07 14:09:06,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-07 14:09:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-07-07 14:09:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-07 14:09:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2020-07-07 14:09:06,886 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 187 [2020-07-07 14:09:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:06,886 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2020-07-07 14:09:06,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 138 states. [2020-07-07 14:09:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2020-07-07 14:09:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-07-07 14:09:06,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:06,888 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:06,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-07-07 14:09:06,889 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:06,889 INFO L82 PathProgramCache]: Analyzing trace with hash -71754359, now seen corresponding path program 45 times [2020-07-07 14:09:06,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:06,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367079872] [2020-07-07 14:09:06,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:09:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:47,348 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:47,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367079872] [2020-07-07 14:09:47,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:47,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2020-07-07 14:09:47,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197061877] [2020-07-07 14:09:47,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2020-07-07 14:09:47,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2020-07-07 14:09:47,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5548, Invalid=14474, Unknown=0, NotChecked=0, Total=20022 [2020-07-07 14:09:47,353 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 141 states. [2020-07-07 14:09:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:50,179 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2020-07-07 14:09:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-07-07 14:09:50,185 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 191 [2020-07-07 14:09:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:50,187 INFO L225 Difference]: With dead ends: 203 [2020-07-07 14:09:50,188 INFO L226 Difference]: Without dead ends: 198 [2020-07-07 14:09:50,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 6 SyntacticMatches, 46 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10088 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=5548, Invalid=14474, Unknown=0, NotChecked=0, Total=20022 [2020-07-07 14:09:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-07 14:09:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2020-07-07 14:09:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-07 14:09:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2020-07-07 14:09:50,199 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 191 [2020-07-07 14:09:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:50,200 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2020-07-07 14:09:50,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 141 states. [2020-07-07 14:09:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2020-07-07 14:09:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-07 14:09:50,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:50,202 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:50,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-07-07 14:09:50,205 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash -911198970, now seen corresponding path program 46 times [2020-07-07 14:09:50,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:50,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364336751] [2020-07-07 14:09:50,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:09:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:10:37,475 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:10:37,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364336751] [2020-07-07 14:10:37,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:10:37,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2020-07-07 14:10:37,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229016614] [2020-07-07 14:10:37,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2020-07-07 14:10:37,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:10:37,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2020-07-07 14:10:37,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5786, Invalid=15094, Unknown=0, NotChecked=0, Total=20880 [2020-07-07 14:10:37,480 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 144 states. [2020-07-07 14:10:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:10:39,249 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2020-07-07 14:10:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-07-07 14:10:39,254 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 195 [2020-07-07 14:10:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:10:39,256 INFO L225 Difference]: With dead ends: 207 [2020-07-07 14:10:39,256 INFO L226 Difference]: Without dead ends: 202 [2020-07-07 14:10:39,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 6 SyntacticMatches, 47 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10542 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=5786, Invalid=15094, Unknown=0, NotChecked=0, Total=20880 [2020-07-07 14:10:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-07 14:10:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-07-07 14:10:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-07 14:10:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2020-07-07 14:10:39,273 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 195 [2020-07-07 14:10:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:10:39,273 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2020-07-07 14:10:39,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 144 states. [2020-07-07 14:10:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2020-07-07 14:10:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-07 14:10:39,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:10:39,274 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:10:39,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-07-07 14:10:39,275 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:10:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:10:39,275 INFO L82 PathProgramCache]: Analyzing trace with hash 254100995, now seen corresponding path program 47 times [2020-07-07 14:10:39,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:10:39,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044573954] [2020-07-07 14:10:39,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:10:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:11:23,996 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:11:23,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044573954] [2020-07-07 14:11:23,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:11:23,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2020-07-07 14:11:23,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020696824] [2020-07-07 14:11:23,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2020-07-07 14:11:23,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:11:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2020-07-07 14:11:24,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6029, Invalid=15727, Unknown=0, NotChecked=0, Total=21756 [2020-07-07 14:11:24,001 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 147 states. [2020-07-07 14:11:26,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:11:26,775 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-07-07 14:11:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-07-07 14:11:26,779 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 199 [2020-07-07 14:11:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:11:26,781 INFO L225 Difference]: With dead ends: 211 [2020-07-07 14:11:26,781 INFO L226 Difference]: Without dead ends: 206 [2020-07-07 14:11:26,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 6 SyntacticMatches, 48 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11006 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=6029, Invalid=15727, Unknown=0, NotChecked=0, Total=21756 [2020-07-07 14:11:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-07 14:11:26,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-07-07 14:11:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-07 14:11:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2020-07-07 14:11:26,792 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 199 [2020-07-07 14:11:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:11:26,792 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2020-07-07 14:11:26,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 147 states. [2020-07-07 14:11:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2020-07-07 14:11:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-07-07 14:11:26,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:11:26,794 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:11:26,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-07-07 14:11:26,795 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:11:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:11:26,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2122346368, now seen corresponding path program 48 times [2020-07-07 14:11:26,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:11:26,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176403261] [2020-07-07 14:11:26,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:11:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:11:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:11:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:12:14,695 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:12:14,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176403261] [2020-07-07 14:12:14,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:12:14,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2020-07-07 14:12:14,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082300144] [2020-07-07 14:12:14,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2020-07-07 14:12:14,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:12:14,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2020-07-07 14:12:14,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6277, Invalid=16373, Unknown=0, NotChecked=0, Total=22650 [2020-07-07 14:12:14,701 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 150 states. [2020-07-07 14:12:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:12:17,867 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2020-07-07 14:12:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-07-07 14:12:17,871 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 203 [2020-07-07 14:12:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:12:17,874 INFO L225 Difference]: With dead ends: 215 [2020-07-07 14:12:17,874 INFO L226 Difference]: Without dead ends: 210 [2020-07-07 14:12:17,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 6 SyntacticMatches, 49 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11480 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=6277, Invalid=16373, Unknown=0, NotChecked=0, Total=22650 [2020-07-07 14:12:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-07 14:12:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-07-07 14:12:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-07 14:12:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2020-07-07 14:12:17,896 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 203 [2020-07-07 14:12:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:12:17,897 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2020-07-07 14:12:17,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 150 states. [2020-07-07 14:12:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2020-07-07 14:12:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-07-07 14:12:17,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:12:17,899 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:12:17,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-07-07 14:12:17,900 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:12:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:12:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1350980733, now seen corresponding path program 49 times [2020-07-07 14:12:17,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:12:17,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509204071] [2020-07-07 14:12:17,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:12:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:12:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:12:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:13:05,561 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:13:05,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509204071] [2020-07-07 14:13:05,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:13:05,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2020-07-07 14:13:05,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012217863] [2020-07-07 14:13:05,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2020-07-07 14:13:05,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:13:05,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2020-07-07 14:13:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6530, Invalid=17032, Unknown=0, NotChecked=0, Total=23562 [2020-07-07 14:13:05,566 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 153 states. [2020-07-07 14:13:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:13:08,295 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2020-07-07 14:13:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-07-07 14:13:08,298 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 207 [2020-07-07 14:13:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:13:08,300 INFO L225 Difference]: With dead ends: 219 [2020-07-07 14:13:08,300 INFO L226 Difference]: Without dead ends: 214 [2020-07-07 14:13:08,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 6 SyntacticMatches, 50 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11964 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=6530, Invalid=17032, Unknown=0, NotChecked=0, Total=23562 [2020-07-07 14:13:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-07 14:13:08,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-07-07 14:13:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-07 14:13:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2020-07-07 14:13:08,310 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 207 [2020-07-07 14:13:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:13:08,311 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2020-07-07 14:13:08,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 153 states. [2020-07-07 14:13:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2020-07-07 14:13:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-07-07 14:13:08,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:13:08,313 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:13:08,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-07-07 14:13:08,313 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:13:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:13:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash -161426950, now seen corresponding path program 50 times [2020-07-07 14:13:08,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:13:08,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271948941] [2020-07-07 14:13:08,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:13:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:13:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:13:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:13:55,661 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:13:55,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271948941] [2020-07-07 14:13:55,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:13:55,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2020-07-07 14:13:55,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399499825] [2020-07-07 14:13:55,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2020-07-07 14:13:55,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:13:55,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2020-07-07 14:13:55,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=17704, Unknown=0, NotChecked=0, Total=24492 [2020-07-07 14:13:55,665 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 156 states. [2020-07-07 14:13:58,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:13:58,598 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2020-07-07 14:13:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2020-07-07 14:13:58,603 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 211 [2020-07-07 14:13:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:13:58,605 INFO L225 Difference]: With dead ends: 223 [2020-07-07 14:13:58,606 INFO L226 Difference]: Without dead ends: 218 [2020-07-07 14:13:58,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 6 SyntacticMatches, 51 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12458 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=6788, Invalid=17704, Unknown=0, NotChecked=0, Total=24492 [2020-07-07 14:13:58,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-07 14:13:58,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2020-07-07 14:13:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-07 14:13:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2020-07-07 14:13:58,615 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 211 [2020-07-07 14:13:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:13:58,615 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2020-07-07 14:13:58,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 156 states. [2020-07-07 14:13:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2020-07-07 14:13:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-07-07 14:13:58,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:13:58,617 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:13:58,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-07-07 14:13:58,617 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:13:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:13:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash 127289591, now seen corresponding path program 51 times [2020-07-07 14:13:58,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:13:58,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108167603] [2020-07-07 14:13:58,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:14:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:14:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:14:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:14:47,870 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:14:47,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108167603] [2020-07-07 14:14:47,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:14:47,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2020-07-07 14:14:47,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015531862] [2020-07-07 14:14:47,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2020-07-07 14:14:47,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:14:47,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2020-07-07 14:14:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7051, Invalid=18389, Unknown=0, NotChecked=0, Total=25440 [2020-07-07 14:14:47,873 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 159 states. [2020-07-07 14:14:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:14:50,248 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2020-07-07 14:14:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2020-07-07 14:14:50,251 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 215 [2020-07-07 14:14:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:14:50,254 INFO L225 Difference]: With dead ends: 227 [2020-07-07 14:14:50,254 INFO L226 Difference]: Without dead ends: 222 [2020-07-07 14:14:50,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 6 SyntacticMatches, 52 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12962 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=7051, Invalid=18389, Unknown=0, NotChecked=0, Total=25440 [2020-07-07 14:14:50,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-07 14:14:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2020-07-07 14:14:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-07 14:14:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2020-07-07 14:14:50,263 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 215 [2020-07-07 14:14:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:14:50,263 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2020-07-07 14:14:50,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 159 states. [2020-07-07 14:14:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2020-07-07 14:14:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-07-07 14:14:50,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:14:50,265 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:14:50,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-07-07 14:14:50,265 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:14:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:14:50,265 INFO L82 PathProgramCache]: Analyzing trace with hash 51247476, now seen corresponding path program 52 times [2020-07-07 14:14:50,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:14:50,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340125991] [2020-07-07 14:14:50,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:14:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:14:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:14:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:15:28,946 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:15:28,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340125991] [2020-07-07 14:15:28,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:15:28,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2020-07-07 14:15:28,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203672807] [2020-07-07 14:15:28,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2020-07-07 14:15:28,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:15:28,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2020-07-07 14:15:28,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7319, Invalid=19087, Unknown=0, NotChecked=0, Total=26406 [2020-07-07 14:15:28,951 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 162 states. [2020-07-07 14:15:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:15:31,121 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2020-07-07 14:15:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2020-07-07 14:15:31,124 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 219 [2020-07-07 14:15:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:15:31,126 INFO L225 Difference]: With dead ends: 231 [2020-07-07 14:15:31,126 INFO L226 Difference]: Without dead ends: 226 [2020-07-07 14:15:31,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 6 SyntacticMatches, 53 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13476 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=7319, Invalid=19087, Unknown=0, NotChecked=0, Total=26406 [2020-07-07 14:15:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-07 14:15:31,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2020-07-07 14:15:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-07-07 14:15:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2020-07-07 14:15:31,134 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 219 [2020-07-07 14:15:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:15:31,134 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2020-07-07 14:15:31,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 162 states. [2020-07-07 14:15:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2020-07-07 14:15:31,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-07-07 14:15:31,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:15:31,136 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:15:31,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-07-07 14:15:31,136 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:15:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:15:31,136 INFO L82 PathProgramCache]: Analyzing trace with hash 571417457, now seen corresponding path program 53 times [2020-07-07 14:15:31,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:15:31,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790251618] [2020-07-07 14:15:31,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 7 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 7 to 13 Garbage collection #2: 13 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 13 to 23 [2020-07-07 14:15:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:15:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:15:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.