/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:08:06,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 15:08:06,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 15:08:06,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 15:08:06,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 15:08:06,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 15:08:06,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 15:08:06,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 15:08:06,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 15:08:06,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 15:08:06,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 15:08:06,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 15:08:06,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:08:06,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:08:06,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:08:06,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:08:06,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:08:06,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:08:06,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:08:06,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:08:06,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:08:06,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:08:06,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:08:06,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:08:06,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:08:06,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:08:06,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:08:06,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:08:06,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 15:08:06,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:08:06,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:08:06,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:08:06,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:08:06,652 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:08:06,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:08:06,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:08:06,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:08:06,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:08:06,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:08:06,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:08:06,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:08:06,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:08:06,654 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:08:06,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:08:06,655 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:08:06,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:08:06,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:08:06,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:08:06,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:08:06,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:08:06,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:08:06,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:08:06,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:08:06,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:08:06,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:08:06,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:08:06,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:08:06,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:08:06,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:08:07,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:08:07,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:08:07,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:08:07,157 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:08:07,158 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:08:07,159 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-09-24 15:08:07,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb29d0dbe/2773215366b54032b3a4ea2aa9c91b4f/FLAGa7afc593c [2020-09-24 15:08:07,837 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:08:07,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-09-24 15:08:07,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb29d0dbe/2773215366b54032b3a4ea2aa9c91b4f/FLAGa7afc593c [2020-09-24 15:08:08,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eb29d0dbe/2773215366b54032b3a4ea2aa9c91b4f [2020-09-24 15:08:08,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:08:08,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:08:08,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:08:08,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:08:08,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:08:08,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:08" (1/1) ... [2020-09-24 15:08:08,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45aac576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08, skipping insertion in model container [2020-09-24 15:08:08,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:08:08" (1/1) ... [2020-09-24 15:08:08,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:08:08,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:08:08,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:08:08,580 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:08:08,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:08:08,618 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:08:08,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08 WrapperNode [2020-09-24 15:08:08,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:08:08,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:08:08,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:08:08,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:08:08,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08" (1/1) ... [2020-09-24 15:08:08,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08" (1/1) ... [2020-09-24 15:08:08,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08" (1/1) ... [2020-09-24 15:08:08,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08" (1/1) ... [2020-09-24 15:08:08,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08" (1/1) ... [2020-09-24 15:08:08,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08" (1/1) ... [2020-09-24 15:08:08,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08" (1/1) ... [2020-09-24 15:08:08,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:08:08,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:08:08,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:08:08,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:08:08,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:08:08,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:08:08,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:08:08,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 15:08:08,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:08:08,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:08:08,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:08:08,820 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 15:08:08,820 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 15:08:08,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:08:08,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:08:08,822 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:08:08,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:08:08,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:08:09,122 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:08:09,123 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 15:08:09,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:09 BoogieIcfgContainer [2020-09-24 15:08:09,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:08:09,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:08:09,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:08:09,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:08:09,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:08:08" (1/3) ... [2020-09-24 15:08:09,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46178a65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:09, skipping insertion in model container [2020-09-24 15:08:09,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:08:08" (2/3) ... [2020-09-24 15:08:09,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46178a65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:08:09, skipping insertion in model container [2020-09-24 15:08:09,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:08:09" (3/3) ... [2020-09-24 15:08:09,140 INFO L109 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-09-24 15:08:09,153 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:08:09,163 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:08:09,189 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:08:09,222 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:08:09,222 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:08:09,223 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:08:09,223 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:08:09,223 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:08:09,223 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:08:09,223 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:08:09,224 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:08:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-09-24 15:08:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 15:08:09,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:09,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:09,262 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1441743938, now seen corresponding path program 1 times [2020-09-24 15:08:09,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:09,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430794411] [2020-09-24 15:08:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:09,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:09,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430794411] [2020-09-24 15:08:09,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:09,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:08:09,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905965420] [2020-09-24 15:08:09,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:08:09,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:08:09,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:08:09,555 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 5 states. [2020-09-24 15:08:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:09,784 INFO L93 Difference]: Finished difference Result 143 states and 210 transitions. [2020-09-24 15:08:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:09,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-24 15:08:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:09,801 INFO L225 Difference]: With dead ends: 143 [2020-09-24 15:08:09,802 INFO L226 Difference]: Without dead ends: 81 [2020-09-24 15:08:09,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:08:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-24 15:08:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-09-24 15:08:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 15:08:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2020-09-24 15:08:09,882 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 25 [2020-09-24 15:08:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:09,883 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2020-09-24 15:08:09,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:08:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2020-09-24 15:08:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 15:08:09,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:09,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:09,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:08:09,887 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:09,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1406858677, now seen corresponding path program 1 times [2020-09-24 15:08:09,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:09,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212041010] [2020-09-24 15:08:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:09,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:09,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212041010] [2020-09-24 15:08:09,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:09,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:08:09,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712343766] [2020-09-24 15:08:09,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:08:09,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:09,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:08:09,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:08:09,991 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 5 states. [2020-09-24 15:08:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:10,114 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-09-24 15:08:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:10,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-24 15:08:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:10,119 INFO L225 Difference]: With dead ends: 85 [2020-09-24 15:08:10,119 INFO L226 Difference]: Without dead ends: 83 [2020-09-24 15:08:10,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:08:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-24 15:08:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-09-24 15:08:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 15:08:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2020-09-24 15:08:10,139 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 25 [2020-09-24 15:08:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:10,139 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2020-09-24 15:08:10,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:08:10,140 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2020-09-24 15:08:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 15:08:10,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:10,141 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:10,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:08:10,142 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:10,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:10,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1771333938, now seen corresponding path program 1 times [2020-09-24 15:08:10,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:10,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114048576] [2020-09-24 15:08:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:08:10,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114048576] [2020-09-24 15:08:10,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:10,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:08:10,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598723743] [2020-09-24 15:08:10,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:08:10,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:10,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:08:10,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:08:10,247 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand 5 states. [2020-09-24 15:08:10,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:10,392 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2020-09-24 15:08:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:10,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-24 15:08:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:10,395 INFO L225 Difference]: With dead ends: 116 [2020-09-24 15:08:10,396 INFO L226 Difference]: Without dead ends: 114 [2020-09-24 15:08:10,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:08:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-24 15:08:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2020-09-24 15:08:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 15:08:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2020-09-24 15:08:10,416 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 30 [2020-09-24 15:08:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:10,416 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2020-09-24 15:08:10,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:08:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2020-09-24 15:08:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 15:08:10,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:10,418 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:10,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:08:10,419 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:10,419 INFO L82 PathProgramCache]: Analyzing trace with hash 456630219, now seen corresponding path program 1 times [2020-09-24 15:08:10,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:10,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362922725] [2020-09-24 15:08:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 15:08:10,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362922725] [2020-09-24 15:08:10,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:10,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 15:08:10,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068775911] [2020-09-24 15:08:10,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 15:08:10,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:10,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 15:08:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:08:10,577 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand 6 states. [2020-09-24 15:08:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:10,766 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-09-24 15:08:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:08:10,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-09-24 15:08:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:10,769 INFO L225 Difference]: With dead ends: 106 [2020-09-24 15:08:10,769 INFO L226 Difference]: Without dead ends: 104 [2020-09-24 15:08:10,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:08:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-24 15:08:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-09-24 15:08:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 15:08:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2020-09-24 15:08:10,789 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 35 [2020-09-24 15:08:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:10,790 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2020-09-24 15:08:10,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 15:08:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2020-09-24 15:08:10,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 15:08:10,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:10,794 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:10,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:08:10,794 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash 364478305, now seen corresponding path program 1 times [2020-09-24 15:08:10,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:10,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911365545] [2020-09-24 15:08:10,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-24 15:08:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 15:08:10,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911365545] [2020-09-24 15:08:10,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:10,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:08:10,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245535184] [2020-09-24 15:08:10,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:08:10,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:10,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:08:10,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:08:10,883 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand 5 states. [2020-09-24 15:08:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:11,019 INFO L93 Difference]: Finished difference Result 135 states and 172 transitions. [2020-09-24 15:08:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:11,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-09-24 15:08:11,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:11,023 INFO L225 Difference]: With dead ends: 135 [2020-09-24 15:08:11,025 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 15:08:11,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:08:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 15:08:11,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2020-09-24 15:08:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-24 15:08:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2020-09-24 15:08:11,048 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 40 [2020-09-24 15:08:11,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:11,049 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2020-09-24 15:08:11,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:08:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2020-09-24 15:08:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 15:08:11,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:11,052 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:11,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:08:11,052 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash 914533499, now seen corresponding path program 1 times [2020-09-24 15:08:11,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:11,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030139980] [2020-09-24 15:08:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-24 15:08:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 15:08:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-24 15:08:11,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030139980] [2020-09-24 15:08:11,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:11,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:08:11,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920872252] [2020-09-24 15:08:11,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:08:11,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:08:11,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:08:11,188 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand 5 states. [2020-09-24 15:08:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:11,270 INFO L93 Difference]: Finished difference Result 229 states and 302 transitions. [2020-09-24 15:08:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:08:11,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-09-24 15:08:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:11,272 INFO L225 Difference]: With dead ends: 229 [2020-09-24 15:08:11,273 INFO L226 Difference]: Without dead ends: 128 [2020-09-24 15:08:11,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-24 15:08:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-09-24 15:08:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-24 15:08:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 165 transitions. [2020-09-24 15:08:11,294 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 165 transitions. Word has length 58 [2020-09-24 15:08:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:11,294 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 165 transitions. [2020-09-24 15:08:11,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:08:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 165 transitions. [2020-09-24 15:08:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-24 15:08:11,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:11,297 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:11,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:08:11,297 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1807369608, now seen corresponding path program 1 times [2020-09-24 15:08:11,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:11,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039766982] [2020-09-24 15:08:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-09-24 15:08:11,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039766982] [2020-09-24 15:08:11,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:11,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:08:11,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913417600] [2020-09-24 15:08:11,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:11,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:11,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:11,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:11,426 INFO L87 Difference]: Start difference. First operand 128 states and 165 transitions. Second operand 7 states. [2020-09-24 15:08:11,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:11,672 INFO L93 Difference]: Finished difference Result 136 states and 172 transitions. [2020-09-24 15:08:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:11,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-09-24 15:08:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:11,677 INFO L225 Difference]: With dead ends: 136 [2020-09-24 15:08:11,678 INFO L226 Difference]: Without dead ends: 134 [2020-09-24 15:08:11,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-24 15:08:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-09-24 15:08:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-24 15:08:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 168 transitions. [2020-09-24 15:08:11,709 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 168 transitions. Word has length 64 [2020-09-24 15:08:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:11,711 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 168 transitions. [2020-09-24 15:08:11,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 168 transitions. [2020-09-24 15:08:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 15:08:11,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:11,722 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:11,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:08:11,722 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:11,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1715909932, now seen corresponding path program 1 times [2020-09-24 15:08:11,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:11,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725574289] [2020-09-24 15:08:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 15:08:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-24 15:08:11,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725574289] [2020-09-24 15:08:11,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:11,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:08:11,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016511555] [2020-09-24 15:08:11,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:11,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:11,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:11,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:11,885 INFO L87 Difference]: Start difference. First operand 132 states and 168 transitions. Second operand 7 states. [2020-09-24 15:08:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:12,065 INFO L93 Difference]: Finished difference Result 162 states and 205 transitions. [2020-09-24 15:08:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:12,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-09-24 15:08:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:12,067 INFO L225 Difference]: With dead ends: 162 [2020-09-24 15:08:12,067 INFO L226 Difference]: Without dead ends: 160 [2020-09-24 15:08:12,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-24 15:08:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 146. [2020-09-24 15:08:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-24 15:08:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 185 transitions. [2020-09-24 15:08:12,084 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 185 transitions. Word has length 69 [2020-09-24 15:08:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:12,085 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 185 transitions. [2020-09-24 15:08:12,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 185 transitions. [2020-09-24 15:08:12,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 15:08:12,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:12,087 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:12,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:08:12,087 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:12,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:12,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1298936315, now seen corresponding path program 1 times [2020-09-24 15:08:12,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:12,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369483138] [2020-09-24 15:08:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 15:08:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-09-24 15:08:12,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369483138] [2020-09-24 15:08:12,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:12,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:08:12,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978404931] [2020-09-24 15:08:12,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:12,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:12,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:12,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:12,192 INFO L87 Difference]: Start difference. First operand 146 states and 185 transitions. Second operand 7 states. [2020-09-24 15:08:12,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:12,400 INFO L93 Difference]: Finished difference Result 210 states and 280 transitions. [2020-09-24 15:08:12,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:12,401 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-09-24 15:08:12,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:12,404 INFO L225 Difference]: With dead ends: 210 [2020-09-24 15:08:12,404 INFO L226 Difference]: Without dead ends: 206 [2020-09-24 15:08:12,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-24 15:08:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2020-09-24 15:08:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-24 15:08:12,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 249 transitions. [2020-09-24 15:08:12,424 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 249 transitions. Word has length 71 [2020-09-24 15:08:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:12,424 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 249 transitions. [2020-09-24 15:08:12,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 249 transitions. [2020-09-24 15:08:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-24 15:08:12,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:12,426 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:12,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:08:12,426 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1528474552, now seen corresponding path program 1 times [2020-09-24 15:08:12,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:12,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31321013] [2020-09-24 15:08:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 15:08:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:08:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-09-24 15:08:12,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31321013] [2020-09-24 15:08:12,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:12,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:08:12,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805027806] [2020-09-24 15:08:12,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:08:12,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:12,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:08:12,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:08:12,557 INFO L87 Difference]: Start difference. First operand 188 states and 249 transitions. Second operand 8 states. [2020-09-24 15:08:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:12,764 INFO L93 Difference]: Finished difference Result 194 states and 254 transitions. [2020-09-24 15:08:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 15:08:12,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-09-24 15:08:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:12,767 INFO L225 Difference]: With dead ends: 194 [2020-09-24 15:08:12,767 INFO L226 Difference]: Without dead ends: 192 [2020-09-24 15:08:12,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:08:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-24 15:08:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-09-24 15:08:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-09-24 15:08:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 252 transitions. [2020-09-24 15:08:12,785 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 252 transitions. Word has length 74 [2020-09-24 15:08:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:12,786 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 252 transitions. [2020-09-24 15:08:12,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:08:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 252 transitions. [2020-09-24 15:08:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 15:08:12,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:12,788 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:12,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:08:12,788 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:12,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:12,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1530703596, now seen corresponding path program 1 times [2020-09-24 15:08:12,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:12,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178926111] [2020-09-24 15:08:12,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 15:08:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:08:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:08:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-24 15:08:12,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178926111] [2020-09-24 15:08:12,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:12,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:08:12,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460646851] [2020-09-24 15:08:12,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:12,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:12,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:12,896 INFO L87 Difference]: Start difference. First operand 192 states and 252 transitions. Second operand 7 states. [2020-09-24 15:08:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:13,050 INFO L93 Difference]: Finished difference Result 220 states and 283 transitions. [2020-09-24 15:08:13,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:13,051 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-09-24 15:08:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:13,053 INFO L225 Difference]: With dead ends: 220 [2020-09-24 15:08:13,053 INFO L226 Difference]: Without dead ends: 218 [2020-09-24 15:08:13,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-24 15:08:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2020-09-24 15:08:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-24 15:08:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2020-09-24 15:08:13,072 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 79 [2020-09-24 15:08:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:13,072 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2020-09-24 15:08:13,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2020-09-24 15:08:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 15:08:13,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:13,074 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:13,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:08:13,074 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:13,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1064000984, now seen corresponding path program 1 times [2020-09-24 15:08:13,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:13,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522713171] [2020-09-24 15:08:13,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 15:08:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:08:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-24 15:08:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-24 15:08:13,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522713171] [2020-09-24 15:08:13,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:13,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:08:13,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840930225] [2020-09-24 15:08:13,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:08:13,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:13,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:08:13,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:08:13,177 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand 7 states. [2020-09-24 15:08:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:13,366 INFO L93 Difference]: Finished difference Result 252 states and 330 transitions. [2020-09-24 15:08:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:08:13,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-09-24 15:08:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:13,369 INFO L225 Difference]: With dead ends: 252 [2020-09-24 15:08:13,370 INFO L226 Difference]: Without dead ends: 246 [2020-09-24 15:08:13,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-24 15:08:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 230. [2020-09-24 15:08:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-09-24 15:08:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 302 transitions. [2020-09-24 15:08:13,391 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 302 transitions. Word has length 81 [2020-09-24 15:08:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:13,392 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 302 transitions. [2020-09-24 15:08:13,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:08:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 302 transitions. [2020-09-24 15:08:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 15:08:13,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:13,395 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:13,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:08:13,395 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:13,396 INFO L82 PathProgramCache]: Analyzing trace with hash -895183749, now seen corresponding path program 1 times [2020-09-24 15:08:13,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:13,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798352186] [2020-09-24 15:08:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 15:08:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:08:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:08:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-09-24 15:08:13,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798352186] [2020-09-24 15:08:13,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:13,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-24 15:08:13,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577887520] [2020-09-24 15:08:13,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:08:13,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:08:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:08:13,602 INFO L87 Difference]: Start difference. First operand 230 states and 302 transitions. Second operand 10 states. [2020-09-24 15:08:13,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:13,885 INFO L93 Difference]: Finished difference Result 236 states and 307 transitions. [2020-09-24 15:08:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:08:13,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 90 [2020-09-24 15:08:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:13,887 INFO L225 Difference]: With dead ends: 236 [2020-09-24 15:08:13,887 INFO L226 Difference]: Without dead ends: 234 [2020-09-24 15:08:13,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:08:13,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-24 15:08:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-09-24 15:08:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-24 15:08:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 305 transitions. [2020-09-24 15:08:13,905 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 305 transitions. Word has length 90 [2020-09-24 15:08:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:13,905 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 305 transitions. [2020-09-24 15:08:13,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:08:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 305 transitions. [2020-09-24 15:08:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-24 15:08:13,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:13,907 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:13,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:08:13,907 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:13,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:13,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1272604239, now seen corresponding path program 1 times [2020-09-24 15:08:13,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:13,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414158932] [2020-09-24 15:08:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:13,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 15:08:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:08:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:08:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 15:08:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-09-24 15:08:14,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414158932] [2020-09-24 15:08:14,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:14,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:08:14,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191396070] [2020-09-24 15:08:14,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:14,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:14,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:14,022 INFO L87 Difference]: Start difference. First operand 234 states and 305 transitions. Second operand 9 states. [2020-09-24 15:08:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:14,226 INFO L93 Difference]: Finished difference Result 262 states and 335 transitions. [2020-09-24 15:08:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:08:14,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2020-09-24 15:08:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:14,229 INFO L225 Difference]: With dead ends: 262 [2020-09-24 15:08:14,229 INFO L226 Difference]: Without dead ends: 260 [2020-09-24 15:08:14,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:08:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-24 15:08:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 246. [2020-09-24 15:08:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-09-24 15:08:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 318 transitions. [2020-09-24 15:08:14,251 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 318 transitions. Word has length 95 [2020-09-24 15:08:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:14,252 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 318 transitions. [2020-09-24 15:08:14,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 318 transitions. [2020-09-24 15:08:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 15:08:14,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:14,254 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:14,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 15:08:14,255 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:14,255 INFO L82 PathProgramCache]: Analyzing trace with hash -960498755, now seen corresponding path program 1 times [2020-09-24 15:08:14,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:14,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092553460] [2020-09-24 15:08:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 15:08:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:08:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-24 15:08:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-24 15:08:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 15:08:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 15:08:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-09-24 15:08:14,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092553460] [2020-09-24 15:08:14,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:14,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:08:14,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918458672] [2020-09-24 15:08:14,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:14,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:14,421 INFO L87 Difference]: Start difference. First operand 246 states and 318 transitions. Second operand 9 states. [2020-09-24 15:08:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:14,695 INFO L93 Difference]: Finished difference Result 293 states and 378 transitions. [2020-09-24 15:08:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:08:14,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 110 [2020-09-24 15:08:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:14,697 INFO L225 Difference]: With dead ends: 293 [2020-09-24 15:08:14,698 INFO L226 Difference]: Without dead ends: 291 [2020-09-24 15:08:14,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:08:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-09-24 15:08:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 270. [2020-09-24 15:08:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-09-24 15:08:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 349 transitions. [2020-09-24 15:08:14,723 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 349 transitions. Word has length 110 [2020-09-24 15:08:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:14,724 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 349 transitions. [2020-09-24 15:08:14,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 349 transitions. [2020-09-24 15:08:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-24 15:08:14,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:14,727 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:14,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 15:08:14,728 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:14,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:14,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1038471395, now seen corresponding path program 1 times [2020-09-24 15:08:14,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:14,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353214156] [2020-09-24 15:08:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 15:08:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:08:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:08:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 15:08:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 15:08:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 15:08:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-09-24 15:08:14,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353214156] [2020-09-24 15:08:14,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:14,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:08:14,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070410008] [2020-09-24 15:08:14,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:14,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:14,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:14,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:14,904 INFO L87 Difference]: Start difference. First operand 270 states and 349 transitions. Second operand 9 states. [2020-09-24 15:08:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:15,183 INFO L93 Difference]: Finished difference Result 372 states and 494 transitions. [2020-09-24 15:08:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:08:15,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 110 [2020-09-24 15:08:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:15,186 INFO L225 Difference]: With dead ends: 372 [2020-09-24 15:08:15,186 INFO L226 Difference]: Without dead ends: 368 [2020-09-24 15:08:15,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:08:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-09-24 15:08:15,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 345. [2020-09-24 15:08:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-09-24 15:08:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 458 transitions. [2020-09-24 15:08:15,227 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 458 transitions. Word has length 110 [2020-09-24 15:08:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:15,227 INFO L479 AbstractCegarLoop]: Abstraction has 345 states and 458 transitions. [2020-09-24 15:08:15,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:15,228 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 458 transitions. [2020-09-24 15:08:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-09-24 15:08:15,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:15,230 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:15,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 15:08:15,230 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:15,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1539222205, now seen corresponding path program 1 times [2020-09-24 15:08:15,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:15,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911458099] [2020-09-24 15:08:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 15:08:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:08:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-24 15:08:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-24 15:08:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 15:08:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 15:08:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:08:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-24 15:08:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-09-24 15:08:15,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911458099] [2020-09-24 15:08:15,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:15,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 15:08:15,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829867177] [2020-09-24 15:08:15,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:08:15,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:08:15,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:08:15,374 INFO L87 Difference]: Start difference. First operand 345 states and 458 transitions. Second operand 9 states. [2020-09-24 15:08:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:15,680 INFO L93 Difference]: Finished difference Result 379 states and 496 transitions. [2020-09-24 15:08:15,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:08:15,681 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 120 [2020-09-24 15:08:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:15,684 INFO L225 Difference]: With dead ends: 379 [2020-09-24 15:08:15,684 INFO L226 Difference]: Without dead ends: 377 [2020-09-24 15:08:15,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:08:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-09-24 15:08:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2020-09-24 15:08:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-09-24 15:08:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 475 transitions. [2020-09-24 15:08:15,713 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 475 transitions. Word has length 120 [2020-09-24 15:08:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:15,713 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 475 transitions. [2020-09-24 15:08:15,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:08:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 475 transitions. [2020-09-24 15:08:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-09-24 15:08:15,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:15,716 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:15,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 15:08:15,717 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:15,717 INFO L82 PathProgramCache]: Analyzing trace with hash 871752502, now seen corresponding path program 1 times [2020-09-24 15:08:15,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:15,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071927460] [2020-09-24 15:08:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 15:08:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:08:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:08:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 15:08:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 15:08:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 15:08:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:08:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-24 15:08:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-09-24 15:08:15,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071927460] [2020-09-24 15:08:15,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:15,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 15:08:15,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023134406] [2020-09-24 15:08:15,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:15,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:15,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:15,878 INFO L87 Difference]: Start difference. First operand 359 states and 475 transitions. Second operand 11 states. [2020-09-24 15:08:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:16,221 INFO L93 Difference]: Finished difference Result 424 states and 562 transitions. [2020-09-24 15:08:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 15:08:16,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 120 [2020-09-24 15:08:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:16,225 INFO L225 Difference]: With dead ends: 424 [2020-09-24 15:08:16,226 INFO L226 Difference]: Without dead ends: 418 [2020-09-24 15:08:16,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-24 15:08:16,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-09-24 15:08:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 398. [2020-09-24 15:08:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-09-24 15:08:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 529 transitions. [2020-09-24 15:08:16,258 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 529 transitions. Word has length 120 [2020-09-24 15:08:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:16,259 INFO L479 AbstractCegarLoop]: Abstraction has 398 states and 529 transitions. [2020-09-24 15:08:16,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 529 transitions. [2020-09-24 15:08:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 15:08:16,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:16,276 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:16,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 15:08:16,276 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:16,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1668448602, now seen corresponding path program 1 times [2020-09-24 15:08:16,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:16,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028553385] [2020-09-24 15:08:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 15:08:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:08:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-24 15:08:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-24 15:08:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 15:08:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 15:08:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:08:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-24 15:08:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-24 15:08:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 15:08:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-09-24 15:08:16,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028553385] [2020-09-24 15:08:16,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:16,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 15:08:16,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193961031] [2020-09-24 15:08:16,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:16,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:16,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:16,447 INFO L87 Difference]: Start difference. First operand 398 states and 529 transitions. Second operand 11 states. [2020-09-24 15:08:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:16,749 INFO L93 Difference]: Finished difference Result 432 states and 566 transitions. [2020-09-24 15:08:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:08:16,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-09-24 15:08:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:16,753 INFO L225 Difference]: With dead ends: 432 [2020-09-24 15:08:16,753 INFO L226 Difference]: Without dead ends: 430 [2020-09-24 15:08:16,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-09-24 15:08:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-09-24 15:08:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 410. [2020-09-24 15:08:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-09-24 15:08:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 542 transitions. [2020-09-24 15:08:16,778 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 542 transitions. Word has length 136 [2020-09-24 15:08:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:16,779 INFO L479 AbstractCegarLoop]: Abstraction has 410 states and 542 transitions. [2020-09-24 15:08:16,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 542 transitions. [2020-09-24 15:08:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 15:08:16,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:16,782 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:16,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 15:08:16,782 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash 362381850, now seen corresponding path program 1 times [2020-09-24 15:08:16,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:16,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299689642] [2020-09-24 15:08:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 15:08:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:08:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-24 15:08:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-24 15:08:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 15:08:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 15:08:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:08:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-24 15:08:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-24 15:08:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 15:08:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-24 15:08:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:08:16,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-09-24 15:08:16,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299689642] [2020-09-24 15:08:16,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:16,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 15:08:16,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624286718] [2020-09-24 15:08:16,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:16,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:16,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:16,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:16,962 INFO L87 Difference]: Start difference. First operand 410 states and 542 transitions. Second operand 11 states. [2020-09-24 15:08:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:17,404 INFO L93 Difference]: Finished difference Result 645 states and 888 transitions. [2020-09-24 15:08:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:08:17,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-09-24 15:08:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:17,411 INFO L225 Difference]: With dead ends: 645 [2020-09-24 15:08:17,411 INFO L226 Difference]: Without dead ends: 639 [2020-09-24 15:08:17,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-09-24 15:08:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2020-09-24 15:08:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 572. [2020-09-24 15:08:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2020-09-24 15:08:17,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 778 transitions. [2020-09-24 15:08:17,451 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 778 transitions. Word has length 151 [2020-09-24 15:08:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:17,451 INFO L479 AbstractCegarLoop]: Abstraction has 572 states and 778 transitions. [2020-09-24 15:08:17,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 778 transitions. [2020-09-24 15:08:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 15:08:17,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:17,454 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:17,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 15:08:17,454 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:17,455 INFO L82 PathProgramCache]: Analyzing trace with hash -978309232, now seen corresponding path program 2 times [2020-09-24 15:08:17,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:17,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072657249] [2020-09-24 15:08:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 15:08:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:08:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:08:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 15:08:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 15:08:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 15:08:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:08:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-24 15:08:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-09-24 15:08:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:08:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-24 15:08:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:08:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-09-24 15:08:17,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072657249] [2020-09-24 15:08:17,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:17,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 15:08:17,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265399416] [2020-09-24 15:08:17,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:08:17,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:17,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:08:17,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:08:17,645 INFO L87 Difference]: Start difference. First operand 572 states and 778 transitions. Second operand 11 states. [2020-09-24 15:08:18,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:18,214 INFO L93 Difference]: Finished difference Result 647 states and 885 transitions. [2020-09-24 15:08:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 15:08:18,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-09-24 15:08:18,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:18,221 INFO L225 Difference]: With dead ends: 647 [2020-09-24 15:08:18,221 INFO L226 Difference]: Without dead ends: 641 [2020-09-24 15:08:18,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-09-24 15:08:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-09-24 15:08:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 412. [2020-09-24 15:08:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-09-24 15:08:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 539 transitions. [2020-09-24 15:08:18,267 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 539 transitions. Word has length 151 [2020-09-24 15:08:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:18,268 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 539 transitions. [2020-09-24 15:08:18,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:08:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 539 transitions. [2020-09-24 15:08:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-24 15:08:18,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:18,271 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:18,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 15:08:18,272 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:18,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1688386477, now seen corresponding path program 1 times [2020-09-24 15:08:18,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:18,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718421960] [2020-09-24 15:08:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 15:08:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 15:08:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-24 15:08:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-24 15:08:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-24 15:08:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 15:08:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:08:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-09-24 15:08:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-09-24 15:08:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 15:08:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-24 15:08:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:08:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 15:08:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-24 15:08:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-09-24 15:08:18,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718421960] [2020-09-24 15:08:18,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:18,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-24 15:08:18,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331066175] [2020-09-24 15:08:18,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:08:18,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:08:18,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:08:18,537 INFO L87 Difference]: Start difference. First operand 412 states and 539 transitions. Second operand 13 states. [2020-09-24 15:08:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:19,049 INFO L93 Difference]: Finished difference Result 505 states and 669 transitions. [2020-09-24 15:08:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 15:08:19,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 161 [2020-09-24 15:08:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:19,056 INFO L225 Difference]: With dead ends: 505 [2020-09-24 15:08:19,056 INFO L226 Difference]: Without dead ends: 495 [2020-09-24 15:08:19,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-09-24 15:08:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-09-24 15:08:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 459. [2020-09-24 15:08:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-09-24 15:08:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 603 transitions. [2020-09-24 15:08:19,087 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 603 transitions. Word has length 161 [2020-09-24 15:08:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:19,089 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 603 transitions. [2020-09-24 15:08:19,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:08:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 603 transitions. [2020-09-24 15:08:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-24 15:08:19,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:08:19,092 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:08:19,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 15:08:19,093 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:08:19,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:08:19,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1620079197, now seen corresponding path program 2 times [2020-09-24 15:08:19,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:08:19,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489435610] [2020-09-24 15:08:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:08:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:08:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:08:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 15:08:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 15:08:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-24 15:08:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 15:08:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-24 15:08:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 15:08:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 15:08:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-24 15:08:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-24 15:08:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-24 15:08:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-24 15:08:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 15:08:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-09-24 15:08:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-24 15:08:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-09-24 15:08:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-09-24 15:08:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-09-24 15:08:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-09-24 15:08:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 15:08:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-09-24 15:08:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:08:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-09-24 15:08:19,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489435610] [2020-09-24 15:08:19,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:08:19,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-24 15:08:19,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591654571] [2020-09-24 15:08:19,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:08:19,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:08:19,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:08:19,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:08:19,374 INFO L87 Difference]: Start difference. First operand 459 states and 603 transitions. Second operand 13 states. [2020-09-24 15:08:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:08:19,859 INFO L93 Difference]: Finished difference Result 499 states and 659 transitions. [2020-09-24 15:08:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 15:08:19,859 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 161 [2020-09-24 15:08:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:08:19,860 INFO L225 Difference]: With dead ends: 499 [2020-09-24 15:08:19,860 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 15:08:19,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-09-24 15:08:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 15:08:19,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 15:08:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 15:08:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 15:08:19,865 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 161 [2020-09-24 15:08:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:08:19,865 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 15:08:19,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:08:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 15:08:19,866 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 15:08:19,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 15:08:19,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 15:08:20,039 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-09-24 15:08:20,185 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-09-24 15:08:20,423 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-09-24 15:08:20,676 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-09-24 15:08:21,277 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 49 [2020-09-24 15:08:21,577 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 16 [2020-09-24 15:08:21,781 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 16 [2020-09-24 15:08:22,088 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2020-09-24 15:08:22,473 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2020-09-24 15:08:22,804 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 18 [2020-09-24 15:08:22,966 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 13 [2020-09-24 15:08:23,094 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 18 [2020-09-24 15:08:23,169 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 15:08:23,170 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:08:23,170 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 15:08:23,170 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 15:08:23,170 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 15:08:23,170 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 15:08:23,170 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 15:08:23,170 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 15:08:23,170 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 15:08:23,170 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 15:08:23,171 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 15:08:23,171 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,171 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-24 15:08:23,171 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 56) no Hoare annotation was computed. [2020-09-24 15:08:23,171 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-09-24 15:08:23,172 INFO L264 CegarLoopResult]: At program point L23-3(lines 23 54) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0))) (or (and (<= main_~len~0 main_~i~0) .cse0) (and (<= 0 main_~i~0) .cse0))) [2020-09-24 15:08:23,172 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-24 15:08:23,172 INFO L268 CegarLoopResult]: For program point L23-4(lines 23 54) no Hoare annotation was computed. [2020-09-24 15:08:23,172 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-09-24 15:08:23,173 INFO L268 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-09-24 15:08:23,173 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (<= (+ main_~j~0 5) main_~bufsize~0)) (.cse1 (<= 0 main_~j~0)) (.cse2 (< main_~i~0 main_~len~0)) (.cse3 (<= (+ main_~limit~0 4) main_~bufsize~0))) (or (and .cse0 .cse1 .cse2 (<= 0 main_~i~0) .cse3) (and .cse0 .cse1 (<= main_~len~0 (+ main_~i~0 1)) .cse2 .cse3))) [2020-09-24 15:08:23,173 INFO L268 CegarLoopResult]: For program point L40(line 40) no Hoare annotation was computed. [2020-09-24 15:08:23,173 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-09-24 15:08:23,173 INFO L268 CegarLoopResult]: For program point L40-2(line 40) no Hoare annotation was computed. [2020-09-24 15:08:23,174 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 1 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 1 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,174 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-24 15:08:23,174 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-09-24 15:08:23,174 INFO L268 CegarLoopResult]: For program point L28-1(line 28) no Hoare annotation was computed. [2020-09-24 15:08:23,174 INFO L268 CegarLoopResult]: For program point L28-3(line 28) no Hoare annotation was computed. [2020-09-24 15:08:23,174 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-24 15:08:23,174 INFO L264 CegarLoopResult]: At program point L24-3(lines 24 53) the Hoare annotation is: (let ((.cse0 (<= (+ main_~limit~0 4) main_~bufsize~0))) (or (and (<= 0 main_~j~0) (<= 0 main_~i~0) .cse0) (and (<= main_~len~0 main_~i~0) .cse0))) [2020-09-24 15:08:23,174 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 15:08:23,175 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-24 15:08:23,175 INFO L268 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-09-24 15:08:23,175 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 15:08:23,175 INFO L264 CegarLoopResult]: At program point L45(lines 25 52) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,175 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 2 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0)) [2020-09-24 15:08:23,175 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 2 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= 2 main_~j~0)) [2020-09-24 15:08:23,176 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 1 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,176 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-09-24 15:08:23,176 INFO L268 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-09-24 15:08:23,176 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,176 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,176 INFO L268 CegarLoopResult]: For program point L25(lines 25 52) no Hoare annotation was computed. [2020-09-24 15:08:23,176 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-09-24 15:08:23,176 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-09-24 15:08:23,177 INFO L268 CegarLoopResult]: For program point L21-2(line 21) no Hoare annotation was computed. [2020-09-24 15:08:23,177 INFO L268 CegarLoopResult]: For program point L50(line 50) no Hoare annotation was computed. [2020-09-24 15:08:23,177 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 15:08:23,177 INFO L268 CegarLoopResult]: For program point L50-1(line 50) no Hoare annotation was computed. [2020-09-24 15:08:23,177 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,177 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 56) no Hoare annotation was computed. [2020-09-24 15:08:23,177 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-09-24 15:08:23,177 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-09-24 15:08:23,178 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-09-24 15:08:23,178 INFO L268 CegarLoopResult]: For program point L34-1(line 34) no Hoare annotation was computed. [2020-09-24 15:08:23,178 INFO L268 CegarLoopResult]: For program point L34-2(line 34) no Hoare annotation was computed. [2020-09-24 15:08:23,178 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,178 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 56) the Hoare annotation is: true [2020-09-24 15:08:23,178 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,178 INFO L264 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,179 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-24 15:08:23,179 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-09-24 15:08:23,179 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 15:08:23,179 INFO L268 CegarLoopResult]: For program point L51-1(line 51) no Hoare annotation was computed. [2020-09-24 15:08:23,179 INFO L268 CegarLoopResult]: For program point L51-2(line 51) no Hoare annotation was computed. [2020-09-24 15:08:23,179 INFO L264 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (<= (+ main_~j~0 5) main_~bufsize~0)) (.cse1 (<= 0 main_~j~0)) (.cse2 (< main_~i~0 main_~len~0)) (.cse3 (<= (+ main_~limit~0 4) main_~bufsize~0))) (or (and .cse0 .cse1 .cse2 (<= 0 main_~i~0) .cse3) (and .cse0 .cse1 (<= main_~len~0 (+ main_~i~0 1)) .cse2 .cse3))) [2020-09-24 15:08:23,179 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-09-24 15:08:23,179 INFO L268 CegarLoopResult]: For program point L43-1(line 43) no Hoare annotation was computed. [2020-09-24 15:08:23,180 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-09-24 15:08:23,180 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-09-24 15:08:23,180 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= 1 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 1 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,180 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (and (<= 1 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 1 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-09-24 15:08:23,180 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 15:08:23,180 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 15:08:23,180 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 15:08:23,181 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 15:08:23,181 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 15:08:23,181 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 15:08:23,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:08:23 BoogieIcfgContainer [2020-09-24 15:08:23,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:08:23,207 INFO L168 Benchmark]: Toolchain (without parser) took 14936.28 ms. Allocated memory was 138.9 MB in the beginning and 380.1 MB in the end (delta: 241.2 MB). Free memory was 101.9 MB in the beginning and 179.3 MB in the end (delta: -77.4 MB). Peak memory consumption was 254.7 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:23,207 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:08:23,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.06 ms. Allocated memory is still 138.9 MB. Free memory was 101.3 MB in the beginning and 91.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:23,208 INFO L168 Benchmark]: Boogie Preprocessor took 118.10 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 91.1 MB in the beginning and 177.2 MB in the end (delta: -86.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:23,209 INFO L168 Benchmark]: RCFGBuilder took 392.46 ms. Allocated memory is still 199.2 MB. Free memory was 177.2 MB in the beginning and 158.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:23,210 INFO L168 Benchmark]: TraceAbstraction took 14073.14 ms. Allocated memory was 199.2 MB in the beginning and 380.1 MB in the end (delta: 180.9 MB). Free memory was 158.8 MB in the beginning and 179.3 MB in the end (delta: -20.5 MB). Peak memory consumption was 251.2 MB. Max. memory is 7.1 GB. [2020-09-24 15:08:23,212 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.06 ms. Allocated memory is still 138.9 MB. Free memory was 101.3 MB in the beginning and 91.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.10 ms. Allocated memory was 138.9 MB in the beginning and 199.2 MB in the end (delta: 60.3 MB). Free memory was 91.1 MB in the beginning and 177.2 MB in the end (delta: -86.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 392.46 ms. Allocated memory is still 199.2 MB. Free memory was 177.2 MB in the beginning and 158.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14073.14 ms. Allocated memory was 199.2 MB in the beginning and 380.1 MB in the end (delta: 180.9 MB). Free memory was 158.8 MB in the beginning and 179.3 MB in the end (delta: -20.5 MB). Peak memory consumption was 251.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((j + 5 <= bufsize && 0 <= j) && i < len) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (len <= i && limit + 4 <= bufsize) || (0 <= i && limit + 4 <= bufsize) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((0 <= j && 0 <= i) && limit + 4 <= bufsize) || (len <= i && limit + 4 <= bufsize) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.6s, OverallIterations: 23, TraceHistogramMax: 22, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2525 SDtfs, 790 SDslu, 12024 SDs, 0 SdLazy, 3765 SolverSat, 436 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=572occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 23 MinimizatonAttempts, 542 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 258 PreInvPairs, 457 NumberOfFragments, 426 HoareAnnotationTreeSize, 258 FomulaSimplifications, 805103 FormulaSimplificationTreeSizeReduction, 1.4s HoareSimplificationTime, 23 FomulaSimplificationsInter, 13801 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 2033 ConstructedInterpolants, 0 QuantifiedInterpolants, 394477 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 6694/6694 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...