/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:30:34,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:30:34,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:30:34,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:30:34,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:30:34,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:30:34,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:30:34,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:30:34,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:30:34,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:30:34,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:30:34,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:30:34,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:30:34,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:30:34,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:30:34,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:30:34,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:30:34,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:30:34,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:30:34,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:30:34,784 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:30:34,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:30:34,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:30:34,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:30:34,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:30:34,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:30:34,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:30:34,785 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:30:35,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:30:35,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:30:35,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:30:35,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:30:35,285 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:30:35,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2021-02-24 00:30:35,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101b1233d/de5b38a53c414db0a877eb44a6cb5491/FLAG2e9b62163 [2021-02-24 00:30:35,984 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:30:35,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2021-02-24 00:30:35,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101b1233d/de5b38a53c414db0a877eb44a6cb5491/FLAG2e9b62163 [2021-02-24 00:30:36,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/101b1233d/de5b38a53c414db0a877eb44a6cb5491 [2021-02-24 00:30:36,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:30:36,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:30:36,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:30:36,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:30:36,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:30:36,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:30:36" (1/1) ... [2021-02-24 00:30:36,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7402c41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36, skipping insertion in model container [2021-02-24 00:30:36,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:30:36" (1/1) ... [2021-02-24 00:30:36,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:30:36,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:30:36,557 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c[403,416] [2021-02-24 00:30:36,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:30:36,591 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:30:36,603 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c[403,416] [2021-02-24 00:30:36,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:30:36,626 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:30:36,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36 WrapperNode [2021-02-24 00:30:36,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:30:36,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:30:36,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:30:36,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:30:36,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36" (1/1) ... [2021-02-24 00:30:36,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36" (1/1) ... [2021-02-24 00:30:36,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36" (1/1) ... [2021-02-24 00:30:36,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36" (1/1) ... [2021-02-24 00:30:36,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36" (1/1) ... [2021-02-24 00:30:36,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36" (1/1) ... [2021-02-24 00:30:36,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36" (1/1) ... [2021-02-24 00:30:36,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:30:36,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:30:36,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:30:36,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:30:36,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:30:36,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:30:36,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:30:36,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:30:36,783 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:30:36,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:30:36,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:30:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:30:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:30:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:30:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:30:36,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:30:36,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:30:36,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 00:30:36,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:30:36,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:30:36,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:30:37,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:30:37,238 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:30:37,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:30:37 BoogieIcfgContainer [2021-02-24 00:30:37,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:30:37,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:30:37,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:30:37,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:30:37,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:30:36" (1/3) ... [2021-02-24 00:30:37,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf00365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:30:37, skipping insertion in model container [2021-02-24 00:30:37,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:30:36" (2/3) ... [2021-02-24 00:30:37,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf00365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:30:37, skipping insertion in model container [2021-02-24 00:30:37,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:30:37" (3/3) ... [2021-02-24 00:30:37,266 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt4.c [2021-02-24 00:30:37,274 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:30:37,280 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:30:37,306 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:30:37,349 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:30:37,349 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:30:37,349 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:30:37,349 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:30:37,349 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:30:37,350 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:30:37,350 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:30:37,350 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:30:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2021-02-24 00:30:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-24 00:30:37,397 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:37,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:37,398 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2008420778, now seen corresponding path program 1 times [2021-02-24 00:30:37,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:37,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313266312] [2021-02-24 00:30:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:37,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:37,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:37,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:37,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:37,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:37,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313266312] [2021-02-24 00:30:37,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:30:37,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:30:37,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559296303] [2021-02-24 00:30:37,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:30:37,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:37,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:30:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:30:37,939 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2021-02-24 00:30:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:38,054 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-02-24 00:30:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:30:38,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2021-02-24 00:30:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:38,071 INFO L225 Difference]: With dead ends: 57 [2021-02-24 00:30:38,071 INFO L226 Difference]: Without dead ends: 36 [2021-02-24 00:30:38,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:30:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-24 00:30:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-02-24 00:30:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-24 00:30:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-02-24 00:30:38,132 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 27 [2021-02-24 00:30:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:38,133 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-02-24 00:30:38,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:30:38,134 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-02-24 00:30:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-24 00:30:38,135 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:38,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:38,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:30:38,136 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:38,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2031508803, now seen corresponding path program 1 times [2021-02-24 00:30:38,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:38,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487976568] [2021-02-24 00:30:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:38,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:38,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:38,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:38,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:38,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,309 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:38,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:38,355 WARN L141 QuantifierPusher]: treesize reduction 24, result has 70.7 percent of original size [2021-02-24 00:30:38,358 WARN L147 QuantifierPusher]: treesize reduction 24, result has 70.7 percent of original size 58 [2021-02-24 00:30:38,386 WARN L141 QuantifierPusher]: treesize reduction 25, result has 80.8 percent of original size [2021-02-24 00:30:38,391 WARN L147 QuantifierPusher]: treesize reduction 25, result has 80.8 percent of original size 105 [2021-02-24 00:30:38,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:38,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:38,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:38,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:38,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:38,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:38,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487976568] [2021-02-24 00:30:38,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:30:38,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 00:30:38,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374575712] [2021-02-24 00:30:38,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:30:38,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:38,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:30:38,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:30:38,576 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2021-02-24 00:30:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:39,133 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2021-02-24 00:30:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 00:30:39,134 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-02-24 00:30:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:39,137 INFO L225 Difference]: With dead ends: 87 [2021-02-24 00:30:39,137 INFO L226 Difference]: Without dead ends: 70 [2021-02-24 00:30:39,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:30:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-24 00:30:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2021-02-24 00:30:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-24 00:30:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-02-24 00:30:39,157 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 27 [2021-02-24 00:30:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:39,157 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-02-24 00:30:39,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:30:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-02-24 00:30:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 00:30:39,159 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:39,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:39,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:30:39,159 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:39,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:39,160 INFO L82 PathProgramCache]: Analyzing trace with hash -281319703, now seen corresponding path program 1 times [2021-02-24 00:30:39,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:39,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588998788] [2021-02-24 00:30:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:39,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,302 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:39,305 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:39,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:39,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:39,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:39,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,363 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:39,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:39,437 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:30:39,487 WARN L141 QuantifierPusher]: treesize reduction 26, result has 83.5 percent of original size [2021-02-24 00:30:39,496 WARN L147 QuantifierPusher]: treesize reduction 26, result has 83.5 percent of original size 132 [2021-02-24 00:30:39,617 WARN L141 QuantifierPusher]: treesize reduction 26, result has 83.9 percent of original size [2021-02-24 00:30:39,627 WARN L147 QuantifierPusher]: treesize reduction 26, result has 83.9 percent of original size 135 [2021-02-24 00:30:39,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:39,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:39,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:39,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:39,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:39,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:39,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588998788] [2021-02-24 00:30:39,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:39,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-02-24 00:30:39,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041094904] [2021-02-24 00:30:39,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-24 00:30:39,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-24 00:30:39,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:30:39,818 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 14 states. [2021-02-24 00:30:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:40,634 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-02-24 00:30:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 00:30:40,635 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2021-02-24 00:30:40,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:40,637 INFO L225 Difference]: With dead ends: 83 [2021-02-24 00:30:40,637 INFO L226 Difference]: Without dead ends: 78 [2021-02-24 00:30:40,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-02-24 00:30:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-24 00:30:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2021-02-24 00:30:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-24 00:30:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-02-24 00:30:40,657 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 31 [2021-02-24 00:30:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:40,657 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-02-24 00:30:40,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-24 00:30:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-02-24 00:30:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-24 00:30:40,659 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:40,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:30:40,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:30:40,659 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:40,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1820904171, now seen corresponding path program 2 times [2021-02-24 00:30:40,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:40,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932412095] [2021-02-24 00:30:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:40,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:40,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:40,717 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:30:40,720 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:30:40,740 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:40,740 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:40,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:40,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:40,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:40,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:40,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932412095] [2021-02-24 00:30:40,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:40,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-24 00:30:40,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664927980] [2021-02-24 00:30:40,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:30:40,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:30:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:30:40,814 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2021-02-24 00:30:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:41,014 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-02-24 00:30:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:30:41,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2021-02-24 00:30:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:41,016 INFO L225 Difference]: With dead ends: 62 [2021-02-24 00:30:41,016 INFO L226 Difference]: Without dead ends: 48 [2021-02-24 00:30:41,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:30:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-24 00:30:41,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-02-24 00:30:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-24 00:30:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-02-24 00:30:41,034 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2021-02-24 00:30:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:41,034 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-02-24 00:30:41,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:30:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-02-24 00:30:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:30:41,036 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:41,036 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 00:30:41,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:30:41,037 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2113659377, now seen corresponding path program 1 times [2021-02-24 00:30:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:41,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656200798] [2021-02-24 00:30:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:41,135 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-02-24 00:30:41,138 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size 23 [2021-02-24 00:30:41,166 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-24 00:30:41,168 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-24 00:30:41,193 WARN L141 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size [2021-02-24 00:30:41,194 WARN L147 QuantifierPusher]: treesize reduction 9, result has 59.1 percent of original size 13 [2021-02-24 00:30:41,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:41,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:41,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:41,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 106 [2021-02-24 00:30:41,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:41,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-02-24 00:30:41,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:41,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:41,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:41,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:41,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:41,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:41,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:41,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656200798] [2021-02-24 00:30:41,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:41,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:30:41,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069489350] [2021-02-24 00:30:41,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:30:41,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:41,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:30:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:30:41,444 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2021-02-24 00:30:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:42,030 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-02-24 00:30:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:30:42,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-02-24 00:30:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:42,032 INFO L225 Difference]: With dead ends: 62 [2021-02-24 00:30:42,032 INFO L226 Difference]: Without dead ends: 48 [2021-02-24 00:30:42,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:30:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-24 00:30:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-02-24 00:30:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-24 00:30:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-02-24 00:30:42,055 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2021-02-24 00:30:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:42,057 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-02-24 00:30:42,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:30:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-02-24 00:30:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-24 00:30:42,060 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:42,061 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 00:30:42,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:30:42,061 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:42,062 INFO L82 PathProgramCache]: Analyzing trace with hash -137859973, now seen corresponding path program 1 times [2021-02-24 00:30:42,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:42,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892512005] [2021-02-24 00:30:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:42,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:42,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:42,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:42,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:42,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:42,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:42,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:42,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:30:42,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 00:30:42,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-24 00:30:42,394 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.5 percent of original size [2021-02-24 00:30:42,401 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.5 percent of original size 158 [2021-02-24 00:30:42,517 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-24 00:30:42,521 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 162 [2021-02-24 00:30:42,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:42,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:42,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:42,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:42,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:42,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:42,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892512005] [2021-02-24 00:30:42,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:42,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-24 00:30:42,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511573363] [2021-02-24 00:30:42,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-24 00:30:42,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:42,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-24 00:30:42,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-02-24 00:30:42,694 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 16 states. [2021-02-24 00:30:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:43,615 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-02-24 00:30:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-24 00:30:43,615 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2021-02-24 00:30:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:43,616 INFO L225 Difference]: With dead ends: 80 [2021-02-24 00:30:43,617 INFO L226 Difference]: Without dead ends: 75 [2021-02-24 00:30:43,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-02-24 00:30:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-24 00:30:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 47. [2021-02-24 00:30:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-24 00:30:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-02-24 00:30:43,640 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2021-02-24 00:30:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:43,641 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-02-24 00:30:43,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-24 00:30:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-02-24 00:30:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-24 00:30:43,642 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:43,642 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 00:30:43,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:30:43,643 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:43,643 INFO L82 PathProgramCache]: Analyzing trace with hash 561132571, now seen corresponding path program 1 times [2021-02-24 00:30:43,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:43,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812137623] [2021-02-24 00:30:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:43,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:43,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:43,684 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:30:43,685 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:30:43,702 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:43,703 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:43,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:43,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:43,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:43,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:43,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812137623] [2021-02-24 00:30:43,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:43,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-02-24 00:30:43,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522502332] [2021-02-24 00:30:43,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:30:43,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:30:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:30:43,747 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2021-02-24 00:30:43,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:43,923 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-02-24 00:30:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 00:30:43,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2021-02-24 00:30:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:43,924 INFO L225 Difference]: With dead ends: 61 [2021-02-24 00:30:43,924 INFO L226 Difference]: Without dead ends: 47 [2021-02-24 00:30:43,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:30:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-24 00:30:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-02-24 00:30:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-24 00:30:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-02-24 00:30:43,946 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2021-02-24 00:30:43,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:43,947 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-02-24 00:30:43,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:30:43,947 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-02-24 00:30:43,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-24 00:30:43,948 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:43,949 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 00:30:43,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 00:30:43,949 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:43,950 INFO L82 PathProgramCache]: Analyzing trace with hash -603774553, now seen corresponding path program 2 times [2021-02-24 00:30:43,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:43,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5818298] [2021-02-24 00:30:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:44,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:44,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:44,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:44,033 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:30:44,034 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:30:44,055 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:44,055 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:44,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:44,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:44,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:44,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5818298] [2021-02-24 00:30:44,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:44,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-02-24 00:30:44,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027531164] [2021-02-24 00:30:44,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 00:30:44,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:44,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 00:30:44,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:30:44,120 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 6 states. [2021-02-24 00:30:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:44,407 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-02-24 00:30:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:30:44,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2021-02-24 00:30:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:44,408 INFO L225 Difference]: With dead ends: 68 [2021-02-24 00:30:44,408 INFO L226 Difference]: Without dead ends: 54 [2021-02-24 00:30:44,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:30:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-24 00:30:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-02-24 00:30:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-24 00:30:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-02-24 00:30:44,430 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2021-02-24 00:30:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:44,431 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-02-24 00:30:44,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 00:30:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-02-24 00:30:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 00:30:44,432 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:44,432 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-02-24 00:30:44,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 00:30:44,432 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1189971871, now seen corresponding path program 1 times [2021-02-24 00:30:44,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:44,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164925558] [2021-02-24 00:30:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:44,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:44,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:44,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:44,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:30:44,511 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-24 00:30:44,514 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 109 [2021-02-24 00:30:44,586 WARN L141 QuantifierPusher]: treesize reduction 2, result has 98.5 percent of original size [2021-02-24 00:30:44,591 WARN L147 QuantifierPusher]: treesize reduction 2, result has 98.5 percent of original size 130 [2021-02-24 00:30:44,688 WARN L141 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-02-24 00:30:44,690 WARN L147 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size 137 [2021-02-24 00:30:44,860 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-02-24 00:30:44,865 WARN L141 QuantifierPusher]: treesize reduction 43, result has 74.6 percent of original size [2021-02-24 00:30:44,866 WARN L147 QuantifierPusher]: treesize reduction 43, result has 74.6 percent of original size 126 [2021-02-24 00:30:44,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:44,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:44,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:44,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:44,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164925558] [2021-02-24 00:30:44,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:44,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-24 00:30:44,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67874164] [2021-02-24 00:30:44,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 00:30:44,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:44,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 00:30:44,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-24 00:30:44,924 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 8 states. [2021-02-24 00:30:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:45,427 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-02-24 00:30:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 00:30:45,428 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2021-02-24 00:30:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:45,429 INFO L225 Difference]: With dead ends: 66 [2021-02-24 00:30:45,429 INFO L226 Difference]: Without dead ends: 52 [2021-02-24 00:30:45,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:30:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-24 00:30:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-24 00:30:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-24 00:30:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-02-24 00:30:45,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 42 [2021-02-24 00:30:45,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:45,459 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-02-24 00:30:45,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 00:30:45,459 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-02-24 00:30:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-24 00:30:45,467 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:45,467 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-24 00:30:45,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-24 00:30:45,468 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1991590957, now seen corresponding path program 1 times [2021-02-24 00:30:45,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:45,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732683054] [2021-02-24 00:30:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:45,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:45,580 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:45,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:45,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:45,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:45,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,617 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:45,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:30:45,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:45,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 00:30:45,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:30:45,711 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 00:30:45,736 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size [2021-02-24 00:30:45,738 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.4 percent of original size 151 [2021-02-24 00:30:45,830 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-24 00:30:45,837 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 161 [2021-02-24 00:30:45,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:45,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:45,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,893 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:45,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:45,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:45,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:45,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732683054] [2021-02-24 00:30:45,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:45,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-02-24 00:30:45,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586099595] [2021-02-24 00:30:45,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-24 00:30:45,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:45,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-24 00:30:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-24 00:30:45,952 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2021-02-24 00:30:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:46,921 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-02-24 00:30:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-24 00:30:46,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2021-02-24 00:30:46,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:46,923 INFO L225 Difference]: With dead ends: 75 [2021-02-24 00:30:46,923 INFO L226 Difference]: Without dead ends: 70 [2021-02-24 00:30:46,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-02-24 00:30:46,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-24 00:30:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2021-02-24 00:30:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-24 00:30:46,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-02-24 00:30:46,953 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 43 [2021-02-24 00:30:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:46,954 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-02-24 00:30:46,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-24 00:30:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-02-24 00:30:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-24 00:30:46,957 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:46,957 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-02-24 00:30:46,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-24 00:30:46,957 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash -461844391, now seen corresponding path program 2 times [2021-02-24 00:30:46,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:46,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828184860] [2021-02-24 00:30:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:47,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:47,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,039 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:47,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:47,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:47,062 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:30:47,063 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:30:47,083 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:47,083 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:47,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:47,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:47,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:47,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828184860] [2021-02-24 00:30:47,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:47,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-24 00:30:47,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670569607] [2021-02-24 00:30:47,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:30:47,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:47,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:30:47,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:30:47,131 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 7 states. [2021-02-24 00:30:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:47,462 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2021-02-24 00:30:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:30:47,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2021-02-24 00:30:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:47,464 INFO L225 Difference]: With dead ends: 71 [2021-02-24 00:30:47,464 INFO L226 Difference]: Without dead ends: 57 [2021-02-24 00:30:47,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:30:47,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-24 00:30:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-02-24 00:30:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-24 00:30:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-02-24 00:30:47,489 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 47 [2021-02-24 00:30:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:47,489 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-02-24 00:30:47,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:30:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-02-24 00:30:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-24 00:30:47,491 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:47,491 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-02-24 00:30:47,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-24 00:30:47,492 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:47,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1294839597, now seen corresponding path program 1 times [2021-02-24 00:30:47,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:47,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616938079] [2021-02-24 00:30:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:47,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:47,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:47,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:47,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:47,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:47,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:47,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:30:47,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:30:47,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:47,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:47,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:47,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:47,812 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-24 00:30:47,813 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 37 [2021-02-24 00:30:47,867 WARN L141 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size [2021-02-24 00:30:47,868 WARN L147 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size 40 [2021-02-24 00:30:47,910 WARN L141 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size [2021-02-24 00:30:47,911 WARN L147 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size 44 [2021-02-24 00:30:47,947 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-24 00:30:47,949 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 160 [2021-02-24 00:30:48,057 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-24 00:30:48,059 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 164 [2021-02-24 00:30:48,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:48,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:48,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:48,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:48,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:48,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:48,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:48,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:48,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:48,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616938079] [2021-02-24 00:30:48,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:48,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-02-24 00:30:48,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889237752] [2021-02-24 00:30:48,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-24 00:30:48,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:48,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-24 00:30:48,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:30:48,240 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 20 states. [2021-02-24 00:30:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:49,534 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-02-24 00:30:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-24 00:30:49,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2021-02-24 00:30:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:49,536 INFO L225 Difference]: With dead ends: 70 [2021-02-24 00:30:49,536 INFO L226 Difference]: Without dead ends: 65 [2021-02-24 00:30:49,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-02-24 00:30:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-24 00:30:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-02-24 00:30:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-24 00:30:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-02-24 00:30:49,578 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 48 [2021-02-24 00:30:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:49,579 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-02-24 00:30:49,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-24 00:30:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-02-24 00:30:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-24 00:30:49,580 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:49,580 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-02-24 00:30:49,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-24 00:30:49,580 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1564230823, now seen corresponding path program 2 times [2021-02-24 00:30:49,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:49,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980283741] [2021-02-24 00:30:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:49,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:49,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:49,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:49,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:49,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:49,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:49,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-24 00:30:49,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-02-24 00:30:49,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 00:30:49,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-24 00:30:49,916 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 00:30:49,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-24 00:30:49,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:49,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 00:30:50,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-24 00:30:50,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-24 00:30:50,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-02-24 00:30:50,142 WARN L141 QuantifierPusher]: treesize reduction 26, result has 85.4 percent of original size [2021-02-24 00:30:50,145 WARN L147 QuantifierPusher]: treesize reduction 26, result has 85.4 percent of original size 152 [2021-02-24 00:30:50,244 WARN L141 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size [2021-02-24 00:30:50,246 WARN L147 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size 142 [2021-02-24 00:30:50,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:50,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:50,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:50,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:50,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:50,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:50,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980283741] [2021-02-24 00:30:50,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:50,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-02-24 00:30:50,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724140340] [2021-02-24 00:30:50,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-24 00:30:50,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:50,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-24 00:30:50,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-02-24 00:30:50,462 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 22 states. [2021-02-24 00:30:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:52,266 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-02-24 00:30:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-24 00:30:52,267 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2021-02-24 00:30:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:52,268 INFO L225 Difference]: With dead ends: 79 [2021-02-24 00:30:52,268 INFO L226 Difference]: Without dead ends: 74 [2021-02-24 00:30:52,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-02-24 00:30:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-24 00:30:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-02-24 00:30:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-24 00:30:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-02-24 00:30:52,301 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 52 [2021-02-24 00:30:52,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:52,301 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-02-24 00:30:52,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-02-24 00:30:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-02-24 00:30:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-24 00:30:52,302 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:52,303 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 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] [2021-02-24 00:30:52,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-24 00:30:52,303 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:52,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:52,304 INFO L82 PathProgramCache]: Analyzing trace with hash -387985019, now seen corresponding path program 3 times [2021-02-24 00:30:52,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:52,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987890894] [2021-02-24 00:30:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:52,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:52,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:52,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:52,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:52,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:52,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:52,389 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:30:52,390 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:30:52,429 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:52,429 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:52,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:52,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:52,469 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:52,470 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:52,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987890894] [2021-02-24 00:30:52,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:52,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:30:52,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836397395] [2021-02-24 00:30:52,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:30:52,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:52,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:30:52,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:30:52,480 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 9 states. [2021-02-24 00:30:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:53,001 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-02-24 00:30:53,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:30:53,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2021-02-24 00:30:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:53,003 INFO L225 Difference]: With dead ends: 90 [2021-02-24 00:30:53,003 INFO L226 Difference]: Without dead ends: 69 [2021-02-24 00:30:53,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-02-24 00:30:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-24 00:30:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-02-24 00:30:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-24 00:30:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-02-24 00:30:53,033 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2021-02-24 00:30:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:53,033 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-02-24 00:30:53,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:30:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-02-24 00:30:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-24 00:30:53,034 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:53,034 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 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] [2021-02-24 00:30:53,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-24 00:30:53,035 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:53,035 INFO L82 PathProgramCache]: Analyzing trace with hash -710487167, now seen corresponding path program 4 times [2021-02-24 00:30:53,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:53,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979900470] [2021-02-24 00:30:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:53,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:53,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:53,118 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,119 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:53,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:30:53,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,136 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:30:53,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:30:53,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-02-24 00:30:53,196 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size [2021-02-24 00:30:53,197 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.1 percent of original size 111 [2021-02-24 00:30:53,258 WARN L141 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size [2021-02-24 00:30:53,259 WARN L147 QuantifierPusher]: treesize reduction 7, result has 92.9 percent of original size 92 [2021-02-24 00:30:53,305 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:53,305 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:53,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,306 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:53,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:53,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:53,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:53,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979900470] [2021-02-24 00:30:53,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:53,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:30:53,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183280718] [2021-02-24 00:30:53,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:30:53,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:30:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:30:53,378 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 10 states. [2021-02-24 00:30:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:54,539 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-02-24 00:30:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 00:30:54,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2021-02-24 00:30:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:54,540 INFO L225 Difference]: With dead ends: 83 [2021-02-24 00:30:54,540 INFO L226 Difference]: Without dead ends: 69 [2021-02-24 00:30:54,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-02-24 00:30:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-24 00:30:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2021-02-24 00:30:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-24 00:30:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-02-24 00:30:54,570 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2021-02-24 00:30:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:54,571 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-02-24 00:30:54,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:30:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-02-24 00:30:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-24 00:30:54,571 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:54,572 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 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] [2021-02-24 00:30:54,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-24 00:30:54,572 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1787056917, now seen corresponding path program 5 times [2021-02-24 00:30:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:54,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845130605] [2021-02-24 00:30:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:54,659 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:54,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:54,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:54,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:54,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:54,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:54,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:30:54,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:30:54,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:54,804 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,805 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:54,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:54,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:54,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:54,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:54,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:54,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:54,998 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-24 00:30:54,999 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 37 [2021-02-24 00:30:55,047 WARN L141 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size [2021-02-24 00:30:55,047 WARN L147 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size 40 [2021-02-24 00:30:55,084 WARN L141 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size [2021-02-24 00:30:55,085 WARN L147 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size 44 [2021-02-24 00:30:55,144 WARN L141 QuantifierPusher]: treesize reduction 26, result has 84.1 percent of original size [2021-02-24 00:30:55,146 WARN L147 QuantifierPusher]: treesize reduction 26, result has 84.1 percent of original size 138 [2021-02-24 00:30:55,242 WARN L141 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size [2021-02-24 00:30:55,244 WARN L147 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size 142 [2021-02-24 00:30:55,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:55,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:55,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:55,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:55,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:55,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:55,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:55,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:55,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845130605] [2021-02-24 00:30:55,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:55,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-02-24 00:30:55,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583880632] [2021-02-24 00:30:55,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-24 00:30:55,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-24 00:30:55,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-02-24 00:30:55,498 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 24 states. [2021-02-24 00:30:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:57,215 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-02-24 00:30:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-24 00:30:57,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2021-02-24 00:30:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:57,217 INFO L225 Difference]: With dead ends: 81 [2021-02-24 00:30:57,217 INFO L226 Difference]: Without dead ends: 76 [2021-02-24 00:30:57,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2021-02-24 00:30:57,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-24 00:30:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2021-02-24 00:30:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-02-24 00:30:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-02-24 00:30:57,253 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 58 [2021-02-24 00:30:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:57,253 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-02-24 00:30:57,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-24 00:30:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-02-24 00:30:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-24 00:30:57,254 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:57,254 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 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] [2021-02-24 00:30:57,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-24 00:30:57,254 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash -197088745, now seen corresponding path program 6 times [2021-02-24 00:30:57,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:57,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730460158] [2021-02-24 00:30:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:57,295 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:57,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:57,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:57,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,308 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:57,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:57,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:57,337 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,338 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:57,349 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:30:57,350 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:30:57,376 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:30:57,377 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:30:57,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:57,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:57,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:57,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:57,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730460158] [2021-02-24 00:30:57,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:57,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:30:57,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455528195] [2021-02-24 00:30:57,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:30:57,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:57,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:30:57,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:30:57,438 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 10 states. [2021-02-24 00:30:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:30:58,088 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-02-24 00:30:58,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 00:30:58,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2021-02-24 00:30:58,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:30:58,091 INFO L225 Difference]: With dead ends: 92 [2021-02-24 00:30:58,091 INFO L226 Difference]: Without dead ends: 75 [2021-02-24 00:30:58,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-02-24 00:30:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-24 00:30:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2021-02-24 00:30:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-02-24 00:30:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-02-24 00:30:58,122 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2021-02-24 00:30:58,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:30:58,123 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-02-24 00:30:58,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:30:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-02-24 00:30:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-24 00:30:58,123 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:30:58,124 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 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] [2021-02-24 00:30:58,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-24 00:30:58,124 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:30:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:30:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash 912330031, now seen corresponding path program 7 times [2021-02-24 00:30:58,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:30:58,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797033211] [2021-02-24 00:30:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:30:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:58,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:58,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:30:58,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:30:58,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:30:58,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:30:58,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:30:58,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:30:58,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,282 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:30:58,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:58,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:58,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:58,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:58,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:58,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:58,503 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:58,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:30:58,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:58,581 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:30:58,616 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-24 00:30:58,617 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 37 [2021-02-24 00:30:58,674 WARN L141 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size [2021-02-24 00:30:58,675 WARN L147 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size 40 [2021-02-24 00:30:58,723 WARN L141 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size [2021-02-24 00:30:58,726 WARN L147 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size 44 [2021-02-24 00:30:58,778 WARN L141 QuantifierPusher]: treesize reduction 26, result has 84.1 percent of original size [2021-02-24 00:30:58,782 WARN L147 QuantifierPusher]: treesize reduction 26, result has 84.1 percent of original size 138 [2021-02-24 00:30:58,914 WARN L141 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size [2021-02-24 00:30:58,915 WARN L147 QuantifierPusher]: treesize reduction 26, result has 84.5 percent of original size 142 [2021-02-24 00:30:59,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:59,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:59,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:59,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:30:59,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:59,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:59,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:30:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:30:59,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:30:59,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:30:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:30:59,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797033211] [2021-02-24 00:30:59,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:30:59,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-02-24 00:30:59,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014351826] [2021-02-24 00:30:59,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-24 00:30:59,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:30:59,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-24 00:30:59,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-02-24 00:30:59,173 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 26 states. [2021-02-24 00:31:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:01,337 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-02-24 00:31:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-24 00:31:01,338 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2021-02-24 00:31:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:01,340 INFO L225 Difference]: With dead ends: 88 [2021-02-24 00:31:01,340 INFO L226 Difference]: Without dead ends: 83 [2021-02-24 00:31:01,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=246, Invalid=2010, Unknown=0, NotChecked=0, Total=2256 [2021-02-24 00:31:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-24 00:31:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2021-02-24 00:31:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-24 00:31:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-02-24 00:31:01,383 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 63 [2021-02-24 00:31:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:01,383 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-02-24 00:31:01,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-02-24 00:31:01,384 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-02-24 00:31:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-02-24 00:31:01,384 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:01,384 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 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] [2021-02-24 00:31:01,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-24 00:31:01,385 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:01,385 INFO L82 PathProgramCache]: Analyzing trace with hash -416004005, now seen corresponding path program 8 times [2021-02-24 00:31:01,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:01,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675462722] [2021-02-24 00:31:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:01,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:01,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:01,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:01,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:01,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:01,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:01,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:01,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:01,512 WARN L141 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-02-24 00:31:01,513 WARN L147 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size 19 [2021-02-24 00:31:01,540 WARN L141 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-02-24 00:31:01,540 WARN L147 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size 1 [2021-02-24 00:31:01,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:01,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:01,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:01,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 17 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:31:01,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675462722] [2021-02-24 00:31:01,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:01,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-24 00:31:01,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595438549] [2021-02-24 00:31:01,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 00:31:01,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:01,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 00:31:01,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:31:01,601 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 11 states. [2021-02-24 00:31:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:02,322 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-02-24 00:31:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:31:02,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2021-02-24 00:31:02,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:02,324 INFO L225 Difference]: With dead ends: 97 [2021-02-24 00:31:02,324 INFO L226 Difference]: Without dead ends: 78 [2021-02-24 00:31:02,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-24 00:31:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-24 00:31:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-02-24 00:31:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-24 00:31:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-02-24 00:31:02,364 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 67 [2021-02-24 00:31:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:02,364 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-02-24 00:31:02,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 00:31:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-02-24 00:31:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-24 00:31:02,365 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:02,365 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 4, 3, 3, 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] [2021-02-24 00:31:02,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-24 00:31:02,365 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:02,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1351468609, now seen corresponding path program 9 times [2021-02-24 00:31:02,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:02,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476033932] [2021-02-24 00:31:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:02,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:02,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:02,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:02,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:31:02,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,506 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:02,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:31:02,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:31:02,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:31:02,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:02,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:02,683 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:02,720 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:02,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:02,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:02,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:02,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:02,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:02,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:02,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:02,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:02,985 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-24 00:31:02,986 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 37 [2021-02-24 00:31:03,042 WARN L141 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size [2021-02-24 00:31:03,043 WARN L147 QuantifierPusher]: treesize reduction 7, result has 85.1 percent of original size 40 [2021-02-24 00:31:03,089 WARN L141 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size [2021-02-24 00:31:03,089 WARN L147 QuantifierPusher]: treesize reduction 7, result has 86.3 percent of original size 44 [2021-02-24 00:31:03,143 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-24 00:31:03,144 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 160 [2021-02-24 00:31:03,287 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-24 00:31:03,289 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 164 [2021-02-24 00:31:03,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,403 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:03,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:03,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:03,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:03,550 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:03,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:31:03,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476033932] [2021-02-24 00:31:03,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:03,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-02-24 00:31:03,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666338378] [2021-02-24 00:31:03,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-24 00:31:03,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:03,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-24 00:31:03,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-02-24 00:31:03,578 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 28 states. [2021-02-24 00:31:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:05,993 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2021-02-24 00:31:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-24 00:31:05,994 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 69 [2021-02-24 00:31:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:05,995 INFO L225 Difference]: With dead ends: 91 [2021-02-24 00:31:05,995 INFO L226 Difference]: Without dead ends: 86 [2021-02-24 00:31:05,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=263, Invalid=2389, Unknown=0, NotChecked=0, Total=2652 [2021-02-24 00:31:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-24 00:31:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2021-02-24 00:31:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-02-24 00:31:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-02-24 00:31:06,032 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 69 [2021-02-24 00:31:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:06,033 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-02-24 00:31:06,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-02-24 00:31:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-02-24 00:31:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-02-24 00:31:06,033 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:31:06,034 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 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] [2021-02-24 00:31:06,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-24 00:31:06,034 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:31:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:31:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash 995764333, now seen corresponding path program 10 times [2021-02-24 00:31:06,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:31:06,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765230350] [2021-02-24 00:31:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:31:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:06,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:06,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:31:06,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:31:06,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,147 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-24 00:31:06,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 00:31:06,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:31:06,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-24 00:31:06,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-24 00:31:06,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:06,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:06,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:06,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:06,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:06,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:06,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:06,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:06,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:06,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-24 00:31:06,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:31:06,624 WARN L141 QuantifierPusher]: treesize reduction 9, result has 80.4 percent of original size [2021-02-24 00:31:06,625 WARN L147 QuantifierPusher]: treesize reduction 9, result has 80.4 percent of original size 37 [2021-02-24 00:31:06,690 WARN L141 QuantifierPusher]: treesize reduction 15, result has 74.1 percent of original size [2021-02-24 00:31:06,691 WARN L147 QuantifierPusher]: treesize reduction 15, result has 74.1 percent of original size 43 [2021-02-24 00:31:06,741 WARN L141 QuantifierPusher]: treesize reduction 17, result has 73.4 percent of original size [2021-02-24 00:31:06,743 WARN L147 QuantifierPusher]: treesize reduction 17, result has 73.4 percent of original size 47 [2021-02-24 00:31:06,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-02-24 00:31:06,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:06,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-24 00:31:06,914 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.8 percent of original size [2021-02-24 00:31:06,916 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.8 percent of original size 174 [2021-02-24 00:31:07,054 WARN L141 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size [2021-02-24 00:31:07,055 WARN L147 QuantifierPusher]: treesize reduction 4, result has 97.6 percent of original size 164 [2021-02-24 00:31:07,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:07,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:07,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:07,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:31:07,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:07,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:07,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:31:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:31:07,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:31:07,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:31:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:31:07,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765230350] [2021-02-24 00:31:07,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:31:07,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-02-24 00:31:07,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538721481] [2021-02-24 00:31:07,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-24 00:31:07,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:31:07,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-24 00:31:07,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-02-24 00:31:07,356 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2021-02-24 00:31:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:31:10,078 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-02-24 00:31:10,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-24 00:31:10,079 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 73 [2021-02-24 00:31:10,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:31:10,079 INFO L225 Difference]: With dead ends: 79 [2021-02-24 00:31:10,079 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:31:10,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=281, Invalid=2799, Unknown=0, NotChecked=0, Total=3080 [2021-02-24 00:31:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:31:10,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:31:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:31:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:31:10,082 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-02-24 00:31:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:31:10,082 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:31:10,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-02-24 00:31:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:31:10,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:31:10,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-24 00:31:10,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:31:10,405 WARN L202 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 258 [2021-02-24 00:31:10,761 WARN L202 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 238 [2021-02-24 00:31:11,019 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 249 [2021-02-24 00:31:11,305 WARN L202 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 231 [2021-02-24 00:31:11,547 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 126 [2021-02-24 00:31:11,771 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 138 [2021-02-24 00:31:12,056 WARN L202 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 184 [2021-02-24 00:31:12,413 WARN L202 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 206 [2021-02-24 00:31:13,533 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 241 DAG size of output: 117 [2021-02-24 00:31:14,443 WARN L202 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 105 [2021-02-24 00:31:15,323 WARN L202 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 112 [2021-02-24 00:31:16,743 WARN L202 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 220 DAG size of output: 89 [2021-02-24 00:31:17,383 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 58 [2021-02-24 00:31:17,821 WARN L202 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 56 [2021-02-24 00:31:18,851 WARN L202 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 76 [2021-02-24 00:31:18,967 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 25 [2021-02-24 00:31:20,832 WARN L202 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 216 DAG size of output: 118 [2021-02-24 00:31:21,912 WARN L202 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 67 [2021-02-24 00:31:21,923 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-24 00:31:21,923 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-24 00:31:21,923 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-24 00:31:21,923 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-24 00:31:21,924 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-24 00:31:21,924 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:31:21,924 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-24 00:31:21,924 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:31:21,924 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-24 00:31:21,924 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2021-02-24 00:31:21,924 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-24 00:31:21,925 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-24 00:31:21,925 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-24 00:31:21,925 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2021-02-24 00:31:21,925 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:31:21,925 INFO L185 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2021-02-24 00:31:21,925 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:31:21,925 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:31:21,925 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 5 7) no Hoare annotation was computed. [2021-02-24 00:31:21,925 INFO L189 CegarLoopUtils]: For program point L6(line 6) no Hoare annotation was computed. [2021-02-24 00:31:21,925 INFO L189 CegarLoopUtils]: For program point L6-1(line 6) no Hoare annotation was computed. [2021-02-24 00:31:21,925 INFO L189 CegarLoopUtils]: For program point L6-3(lines 5 7) no Hoare annotation was computed. [2021-02-24 00:31:21,926 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2021-02-24 00:31:21,926 INFO L192 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: true [2021-02-24 00:31:21,926 INFO L185 CegarLoopUtils]: At program point L27(lines 27 30) the Hoare annotation is: (let ((.cse9 (div main_~l~0 4294967296))) (let ((.cse10 (* .cse9 (- 4294967296)))) (let ((.cse7 (div (+ main_~l~0 .cse10) 3)) (.cse5 (* 4294967296 (div main_~n~0 4294967296))) (.cse4 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (let ((.cse3 (<= .cse4 main_~l~0)) (.cse2 (+ .cse5 main_~l~0 1)) (.cse6 (* 4294967296 .cse9)) (.cse0 (= main_~i~0 0)) (.cse1 (= main_~j~0 0)) (.cse8 (div (+ (* .cse7 (- 3)) main_~l~0 .cse10) 4294967296))) (or (and (<= 1 main_~l~0) (= main_~k~0 0) .cse0 .cse1 (<= main_~v4~0 main_~l~0) (<= .cse2 (+ main_~n~0 main_~v4~0)) (<= main_~l~0 main_~v4~0) (<= (div main_~l~0 2) 0)) (and .cse3 (<= main_~l~0 5) (<= 5 .cse4) (<= (+ .cse5 main_~l~0 6) (+ main_~i~0 main_~j~0 main_~k~0 main_~n~0 main_~v4~0 .cse6))) (and .cse3 (<= .cse2 (+ main_~n~0 .cse6)) (<= (+ (* 6 .cse7) (* 8589934593 .cse8) (* 8589934592 .cse9) 2) (* 2 main_~l~0)) (<= .cse9 0) (<= main_~l~0 .cse4) (<= 7 main_~l~0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (and (<= (+ .cse5 main_~l~0) (+ (* 4294967296 (div (+ main_~k~0 main_~v4~0 (- 2)) 4294967296)) main_~n~0 1)) .cse0 .cse1 (<= (+ main_~k~0 main_~v4~0) main_~l~0) (<= (+ .cse7 (* 1431655765 .cse8) (* 1431655765 .cse9)) 0) (<= 6442450942 (+ (* 3221225471 main_~l~0) (div main_~l~0 4))))))))) [2021-02-24 00:31:21,927 INFO L185 CegarLoopUtils]: At program point L25(lines 25 30) the Hoare annotation is: (let ((.cse5 (div main_~l~0 4294967296))) (let ((.cse12 (* .cse5 (- 4294967296)))) (let ((.cse8 (* 4294967296 .cse5)) (.cse10 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0)) (.cse3 (div (+ main_~l~0 .cse12) 3)) (.cse7 (* 4294967296 (div main_~n~0 4294967296)))) (let ((.cse1 (= main_~i~0 0)) (.cse2 (= main_~j~0 0)) (.cse0 (+ .cse7 main_~l~0)) (.cse4 (div (+ (* .cse3 (- 3)) main_~l~0 .cse12) 4294967296)) (.cse9 (<= .cse10 main_~l~0)) (.cse11 (+ main_~i~0 main_~j~0 main_~k~0 main_~n~0 main_~v4~0 .cse8))) (or (and (<= .cse0 (+ (* 4294967296 (div (+ main_~k~0 main_~v4~0 (- 2)) 4294967296)) main_~n~0 1)) .cse1 .cse2 (<= (+ main_~k~0 main_~v4~0) main_~l~0) (<= (+ .cse3 (* 1431655765 .cse4) (* 1431655765 .cse5)) 0) (<= 2 main_~l~0)) (let ((.cse6 (+ main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse6 main_~l~0) .cse1 (<= (div main_~l~0 4) 0) (<= (+ .cse7 main_~l~0 4) (+ main_~j~0 main_~k~0 main_~n~0 main_~v4~0 .cse8)) (<= 3 main_~l~0) (<= main_~l~0 .cse6))) (and .cse9 (<= main_~l~0 5) (<= 5 .cse10) (<= (+ .cse7 main_~l~0 6) .cse11)) (and .cse9 (<= (+ .cse7 main_~l~0 1) (+ main_~n~0 .cse8)) (<= .cse5 0) (<= main_~l~0 .cse10) (<= 7 main_~l~0)) (not (<= ~SIZE~0 20000001)) (and (<= 1 main_~l~0) (= main_~k~0 0) .cse1 .cse2 (<= main_~v4~0 main_~l~0) (<= .cse0 (+ (* 4294967296 (div (+ main_~v4~0 (- 1)) 4294967296)) main_~n~0)) (<= (div main_~l~0 2) 0) (<= (+ (* 25769803776 .cse3) (* 36893488151714070528 .cse4) main_~n~0 (* 36893488151714070528 .cse5) 8569934592) (+ .cse7 (* 8589934593 main_~l~0)))) (not (<= 20000001 ~SIZE~0)) (and .cse9 (<= main_~l~0 6) (<= (+ .cse7 main_~l~0 7) .cse11) (<= 6 .cse10))))))) [2021-02-24 00:31:21,928 INFO L185 CegarLoopUtils]: At program point L27-2(lines 23 30) the Hoare annotation is: (let ((.cse11 (div main_~l~0 4294967296))) (let ((.cse9 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0)) (.cse5 (+ main_~l~0 1)) (.cse2 (* 4294967296 (div main_~n~0 4294967296))) (.cse10 (* 4294967296 .cse11))) (let ((.cse8 (= main_~j~0 0)) (.cse3 (+ main_~i~0 main_~j~0 main_~k~0 main_~n~0 main_~v4~0 .cse10)) (.cse7 (= main_~i~0 0)) (.cse1 (+ .cse2 main_~l~0)) (.cse0 (<= .cse9 .cse5)) (.cse4 (<= .cse5 .cse9))) (or (and .cse0 (<= main_~l~0 3) (<= .cse1 (+ main_~n~0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (- 4)) 4294967296)) 2)) (<= (+ .cse2 main_~l~0 5) .cse3) (<= (+ (* 6442450944 (div (+ main_~l~0 (- 1)) 3)) main_~n~0 2147483652) (+ .cse2 (* 2147483649 main_~l~0)))) (and .cse0 .cse4 (<= main_~l~0 6) (<= (+ .cse2 main_~l~0 8) .cse3) (<= 6 main_~l~0)) (and .cse0 (<= main_~l~0 4) (<= 4 main_~l~0) (<= .cse1 (+ (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (- 5)) 4294967296)) main_~n~0 3))) (let ((.cse6 (+ main_~k~0 main_~v4~0))) (and (<= .cse5 .cse6) (<= 1 main_~l~0) .cse7 .cse8 (<= (+ .cse2 main_~l~0 2) (+ main_~k~0 main_~n~0 main_~v4~0)) (<= .cse6 .cse5) (<= (div main_~l~0 2) 0))) (and (<= (+ .cse2 2) (+ main_~v4~0 main_~n~0)) (<= 1 main_~v4~0) (= main_~k~0 0) .cse7 .cse8 (= main_~l~0 0) (<= main_~v4~0 1) (<= main_~n~0 (+ .cse2 20000001))) (not (<= ~SIZE~0 20000001)) (and .cse0 (<= main_~l~0 5) (<= (+ .cse2 main_~l~0 7) .cse3) (<= 6 .cse9)) (and .cse7 (<= main_~l~0 2) (<= 2 main_~l~0) (<= (+ main_~j~0 main_~k~0 main_~v4~0) .cse5) (<= .cse1 (+ (* 4294967296 (div (+ main_~j~0 main_~k~0 main_~v4~0 (- 3)) 4294967296)) main_~n~0 1))) (not (<= 20000001 ~SIZE~0)) (and .cse0 (<= (+ .cse2 main_~l~0 1) (+ main_~n~0 .cse10)) .cse4 (<= 8 .cse9) (<= .cse11 0)))))) [2021-02-24 00:31:21,928 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 16 35) the Hoare annotation is: true [2021-02-24 00:31:21,929 INFO L185 CegarLoopUtils]: At program point L23(lines 23 30) the Hoare annotation is: (let ((.cse12 (div main_~l~0 4294967296))) (let ((.cse3 (* 4294967296 .cse12)) (.cse5 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0)) (.cse2 (* 4294967296 (div main_~n~0 4294967296)))) (let ((.cse9 (= main_~k~0 0)) (.cse1 (= main_~i~0 0)) (.cse8 (= main_~j~0 0)) (.cse7 (+ .cse2 main_~l~0)) (.cse4 (<= .cse5 main_~l~0)) (.cse6 (+ main_~i~0 main_~j~0 main_~k~0 main_~n~0 main_~v4~0 .cse3))) (or (let ((.cse0 (+ main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) .cse1 (<= (div main_~l~0 4) 0) (<= (+ .cse2 main_~l~0 4) (+ main_~j~0 main_~k~0 main_~n~0 main_~v4~0 .cse3)) (<= 3 main_~l~0) (<= main_~l~0 .cse0))) (and .cse4 (<= main_~l~0 5) (<= 5 .cse5) (<= (+ .cse2 main_~l~0 6) .cse6)) (and (<= .cse7 (+ (* 4294967296 (div (+ main_~k~0 main_~v4~0 (- 2)) 4294967296)) main_~n~0 1)) .cse1 .cse8 (<= (+ main_~k~0 main_~v4~0) main_~l~0) (<= main_~l~0 2) (<= 2 main_~l~0)) (and .cse9 .cse1 .cse8 (= main_~l~0 0) (= main_~v4~0 0) (<= main_~n~0 (+ .cse2 20000001)) (<= (+ .cse2 1) main_~n~0)) (not (<= ~SIZE~0 20000001)) (and (<= 1 main_~l~0) .cse9 .cse1 .cse8 (<= main_~v4~0 main_~l~0) (<= .cse7 (+ (* 4294967296 (div (+ main_~v4~0 (- 1)) 4294967296)) main_~n~0)) (<= (div main_~l~0 2) 0) (<= (let ((.cse11 (* .cse12 (- 4294967296)))) (let ((.cse10 (div (+ main_~l~0 .cse11) 3))) (+ (* 25769803776 .cse10) (* 36893488151714070528 (div (+ (* .cse10 (- 3)) main_~l~0 .cse11) 4294967296)) main_~n~0 (* 36893488151714070528 .cse12) 8569934592))) (+ .cse2 (* 8589934593 main_~l~0)))) (and .cse4 (<= main_~l~0 4) (<= .cse7 (+ main_~n~0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (- 4)) 4294967296)) 3)) (<= 4 main_~l~0)) (and .cse4 (<= 7 .cse5) (<= (+ .cse2 main_~l~0 1) (+ main_~n~0 .cse3)) (<= .cse12 0) (<= main_~l~0 .cse5)) (not (<= 20000001 ~SIZE~0)) (and .cse4 (<= main_~l~0 6) (<= (+ .cse2 main_~l~0 7) .cse6) (<= 6 .cse5)))))) [2021-02-24 00:31:21,929 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (or (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~l~0 0) (= main_~v4~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:31:21,929 INFO L185 CegarLoopUtils]: At program point L21-2(lines 21 32) the Hoare annotation is: (let ((.cse14 (div main_~l~0 4294967296)) (.cse9 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (let ((.cse6 (* 4294967296 (div main_~n~0 4294967296))) (.cse8 (div main_~l~0 4)) (.cse11 (+ (* 4294967296 (div .cse9 4294967296)) main_~l~0)) (.cse10 (* 4294967296 .cse14))) (let ((.cse4 (< .cse11 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse10 1))) (.cse3 (<= .cse8 0)) (.cse5 (= main_~k~0 0)) (.cse1 (= main_~i~0 0)) (.cse2 (= main_~j~0 0)) (.cse7 (<= .cse9 main_~l~0)) (.cse0 (+ .cse6 main_~l~0))) (or (and (<= .cse0 (+ (* 4294967296 (div (+ main_~k~0 main_~v4~0 (- 2)) 4294967296)) main_~n~0 1)) .cse1 .cse2 .cse3 (<= (+ main_~k~0 main_~v4~0) main_~l~0) (<= 2 main_~l~0) .cse4) (and .cse5 .cse1 .cse2 (= main_~l~0 0) (= main_~v4~0 0) (<= main_~n~0 (+ .cse6 20000001))) (and .cse7 (<= .cse8 1) (<= 5 .cse9) .cse4) (and (<= .cse0 (+ (* 4294967296 (div (+ main_~j~0 main_~k~0 main_~v4~0 (- 3)) 4294967296)) main_~n~0 2)) (<= (+ main_~j~0 main_~k~0 main_~v4~0) main_~l~0) .cse1 .cse3 (<= 3 main_~l~0)) (and .cse7 (<= main_~l~0 4) (<= 4 .cse9) (<= .cse0 (+ main_~n~0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (- 4)) 4294967296)) 3))) (not (<= ~SIZE~0 20000001)) (and (<= 1 main_~l~0) .cse5 .cse1 .cse2 (<= .cse0 (+ (* 4294967296 (div (+ main_~v4~0 (- 1)) 4294967296)) main_~n~0)) (<= (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse10) .cse11) (<= (div main_~l~0 2) 0) (<= (let ((.cse13 (* .cse14 (- 4294967296)))) (let ((.cse12 (div (+ main_~l~0 .cse13) 3))) (+ (* 25769803776 .cse12) (* 36893488151714070528 (div (+ (* .cse12 (- 3)) main_~l~0 .cse13) 4294967296)) main_~n~0 (* 36893488151714070528 .cse14) 8569934592))) (+ .cse6 (* 8589934593 main_~l~0))) (<= main_~v4~0 (+ .cse10 4294967295))) (not (<= 20000001 ~SIZE~0)) (and .cse7 (<= 7 .cse9) (<= .cse0 (+ main_~n~0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (- 8)) 4294967296)))) (<= .cse14 0) (<= main_~l~0 .cse9)))))) [2021-02-24 00:31:21,929 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (or (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~l~0 0) (= main_~v4~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:31:21,929 INFO L185 CegarLoopUtils]: At program point L21-3(lines 21 32) the Hoare annotation is: (or (let ((.cse1 (+ (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0) 4294967296)) main_~l~0)) (.cse0 (* 4294967296 (div main_~l~0 4294967296)))) (and (<= (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse0) .cse1) (< .cse1 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse0 1)))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:31:21,929 INFO L192 CegarLoopUtils]: At program point L17(line 17) the Hoare annotation is: true [2021-02-24 00:31:21,929 INFO L185 CegarLoopUtils]: At program point L17-1(line 17) the Hoare annotation is: (or (= main_~i~0 0) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:31:21,930 INFO L185 CegarLoopUtils]: At program point L17-2(line 17) the Hoare annotation is: (or (and (= main_~k~0 0) (= main_~i~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:31:21,930 INFO L185 CegarLoopUtils]: At program point L17-3(line 17) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:31:21,930 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 16 35) the Hoare annotation is: true [2021-02-24 00:31:21,930 INFO L185 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: (let ((.cse7 (div main_~l~0 4294967296)) (.cse3 (* 4294967296 (div main_~n~0 4294967296))) (.cse2 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (let ((.cse1 (<= .cse2 main_~l~0)) (.cse0 (+ .cse3 main_~l~0 1)) (.cse4 (* 4294967296 .cse7))) (or (and (<= 1 main_~l~0) (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (<= main_~v4~0 main_~l~0) (<= .cse0 (+ main_~n~0 main_~v4~0)) (<= main_~l~0 main_~v4~0) (<= (div main_~l~0 2) 0)) (and .cse1 (<= main_~l~0 5) (<= 5 .cse2) (<= (+ .cse3 main_~l~0 6) (+ main_~i~0 main_~j~0 main_~k~0 main_~n~0 main_~v4~0 .cse4))) (and .cse1 (<= 7 .cse2) (<= .cse0 (+ main_~n~0 .cse4)) (<= (let ((.cse6 (* .cse7 (- 4294967296)))) (let ((.cse5 (div (+ main_~l~0 .cse6) 3))) (+ (* 6 .cse5) (* 8589934593 (div (+ (* .cse5 (- 3)) main_~l~0 .cse6) 4294967296)) (* 8589934592 .cse7) 2))) (* 2 main_~l~0)) (<= .cse7 0) (<= main_~l~0 .cse2)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))))) [2021-02-24 00:31:21,930 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 16 35) the Hoare annotation is: true [2021-02-24 00:31:21,930 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (let ((.cse1 (* 4294967296 (div main_~n~0 4294967296)))) (let ((.cse0 (+ .cse1 main_~l~0))) (or (and (<= .cse0 (+ (* 4294967296 (div (+ main_~k~0 main_~v4~0 (- 2)) 4294967296)) main_~n~0 1)) (= main_~i~0 0) (= main_~j~0 0) (<= (+ main_~k~0 main_~v4~0) main_~l~0) (<= main_~l~0 2) (<= (+ (* 6442450944 (div main_~l~0 3)) main_~n~0 3) (+ .cse1 (* 2147483649 main_~l~0)))) (not (<= ~SIZE~0 20000001)) (let ((.cse3 (div main_~l~0 4294967296)) (.cse2 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse2 main_~l~0) (<= 7 .cse2) (<= (+ .cse1 main_~l~0 1) (+ main_~n~0 (* 4294967296 .cse3))) (<= (let ((.cse5 (* .cse3 (- 4294967296)))) (let ((.cse4 (div (+ main_~l~0 .cse5) 3))) (+ (* 6 .cse4) (* 8589934593 (div (+ (* .cse4 (- 3)) main_~l~0 .cse5) 4294967296)) (* 8589934592 .cse3) 2))) (* 2 main_~l~0)) (<= .cse0 (+ main_~n~0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (- 8)) 4294967296)))) (<= .cse3 0) (<= main_~l~0 .cse2))) (not (<= 20000001 ~SIZE~0))))) [2021-02-24 00:31:21,931 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (let ((.cse4 (div main_~l~0 4294967296)) (.cse1 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (let ((.cse0 (<= .cse1 main_~l~0)) (.cse2 (* 4294967296 (div main_~n~0 4294967296))) (.cse3 (* 4294967296 .cse4))) (or (and .cse0 (<= 7 .cse1) (<= (+ .cse2 main_~l~0 1) (+ main_~n~0 .cse3)) (<= (+ .cse2 main_~l~0) (+ main_~n~0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (- 8)) 4294967296)))) (<= .cse4 0) (<= main_~l~0 .cse1)) (not (<= ~SIZE~0 20000001)) (let ((.cse5 (+ main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse5 main_~l~0) (<= main_~l~0 3) (= main_~i~0 0) (<= (+ .cse2 main_~l~0 4) (+ main_~j~0 main_~k~0 main_~n~0 main_~v4~0 .cse3)) (<= 3 main_~l~0) (<= main_~l~0 .cse5))) (not (<= 20000001 ~SIZE~0)) (and .cse0 (<= main_~l~0 6) (<= (+ .cse2 main_~l~0 7) (+ main_~i~0 main_~j~0 main_~k~0 main_~n~0 main_~v4~0 .cse3)) (<= 6 .cse1))))) [2021-02-24 00:31:21,931 INFO L185 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (let ((.cse2 (* 4294967296 (div main_~n~0 4294967296))) (.cse1 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (let ((.cse0 (<= .cse1 main_~l~0)) (.cse4 (+ .cse2 main_~l~0))) (or (let ((.cse3 (div main_~l~0 4294967296))) (and .cse0 (<= 7 .cse1) (<= (+ .cse2 main_~l~0 1) (+ main_~n~0 (* 4294967296 .cse3))) (<= .cse4 (+ main_~n~0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (- 8)) 4294967296)))) (<= .cse3 0) (<= main_~l~0 .cse1))) (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~l~0 0) (= main_~v4~0 0) (<= main_~n~0 (+ .cse2 20000001)) (<= (+ .cse2 1) main_~n~0)) (not (<= ~SIZE~0 20000001)) (and .cse0 (<= main_~l~0 4) (<= .cse4 (+ main_~n~0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 (- 4)) 4294967296)) 3)) (<= 4 main_~l~0)) (not (<= 20000001 ~SIZE~0))))) [2021-02-24 00:31:21,931 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (or (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~l~0 0) (= main_~v4~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:31:21,931 INFO L192 CegarLoopUtils]: At program point L20-1(line 20) the Hoare annotation is: true [2021-02-24 00:31:21,931 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (or (and (= main_~k~0 0) (= main_~i~0 0) (= main_~j~0 0) (= main_~l~0 0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2021-02-24 00:31:21,931 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 8 13) the Hoare annotation is: true [2021-02-24 00:31:21,931 INFO L185 CegarLoopUtils]: At program point L10(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:31:21,932 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 8 13) the Hoare annotation is: true [2021-02-24 00:31:21,932 INFO L185 CegarLoopUtils]: At program point L9(lines 9 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:31:21,932 INFO L185 CegarLoopUtils]: At program point L10-1(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:31:21,932 INFO L192 CegarLoopUtils]: At program point L9-2(lines 8 13) the Hoare annotation is: true [2021-02-24 00:31:21,932 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:31:21,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:31:21 BoogieIcfgContainer [2021-02-24 00:31:21,971 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:31:21,972 INFO L168 Benchmark]: Toolchain (without parser) took 45637.01 ms. Allocated memory was 174.1 MB in the beginning and 362.8 MB in the end (delta: 188.7 MB). Free memory was 149.8 MB in the beginning and 172.6 MB in the end (delta: -22.8 MB). Peak memory consumption was 211.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:21,973 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 174.1 MB. Free memory is still 154.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:31:21,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.05 ms. Allocated memory is still 174.1 MB. Free memory was 148.8 MB in the beginning and 139.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:21,973 INFO L168 Benchmark]: Boogie Preprocessor took 46.24 ms. Allocated memory is still 174.1 MB. Free memory was 139.2 MB in the beginning and 137.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:21,973 INFO L168 Benchmark]: RCFGBuilder took 568.69 ms. Allocated memory is still 174.1 MB. Free memory was 137.7 MB in the beginning and 120.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:21,974 INFO L168 Benchmark]: TraceAbstraction took 44721.40 ms. Allocated memory was 174.1 MB in the beginning and 362.8 MB in the end (delta: 188.7 MB). Free memory was 120.2 MB in the beginning and 172.6 MB in the end (delta: -52.4 MB). Peak memory consumption was 182.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:31:21,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 174.1 MB. Free memory is still 154.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.05 ms. Allocated memory is still 174.1 MB. Free memory was 148.8 MB in the beginning and 139.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.24 ms. Allocated memory is still 174.1 MB. Free memory was 139.2 MB in the beginning and 137.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 568.69 ms. Allocated memory is still 174.1 MB. Free memory was 137.7 MB in the beginning and 120.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 44721.40 ms. Allocated memory was 174.1 MB in the beginning and 362.8 MB in the end (delta: 188.7 MB). Free memory was 120.2 MB in the beginning and 172.6 MB in the end (delta: -52.4 MB). Peak memory consumption was 182.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((((((((((((4294967296 * (n / 4294967296) + l <= 4294967296 * ((k + v4 + -2) / 4294967296) + n + 1 && i == 0) && j == 0) && l / 4 <= 0) && k + v4 <= l) && 2 <= l) && 4294967296 * ((i + j + k + v4) / 4294967296) + l < i + j + k + v4 + 4294967296 * (l / 4294967296) + 1) || (((((k == 0 && i == 0) && j == 0) && l == 0) && v4 == 0) && n <= 4294967296 * (n / 4294967296) + 20000001)) || (((i + j + k + v4 <= l && l / 4 <= 1) && 5 <= i + j + k + v4) && 4294967296 * ((i + j + k + v4) / 4294967296) + l < i + j + k + v4 + 4294967296 * (l / 4294967296) + 1)) || ((((4294967296 * (n / 4294967296) + l <= 4294967296 * ((j + k + v4 + -3) / 4294967296) + n + 2 && j + k + v4 <= l) && i == 0) && l / 4 <= 0) && 3 <= l)) || (((i + j + k + v4 <= l && l <= 4) && 4 <= i + j + k + v4) && 4294967296 * (n / 4294967296) + l <= n + 4294967296 * ((i + j + k + v4 + -4) / 4294967296) + 3)) || !(SIZE <= 20000001)) || ((((((((1 <= l && k == 0) && i == 0) && j == 0) && 4294967296 * (n / 4294967296) + l <= 4294967296 * ((v4 + -1) / 4294967296) + n) && i + j + k + v4 + 4294967296 * (l / 4294967296) <= 4294967296 * ((i + j + k + v4) / 4294967296) + l) && l / 2 <= 0) && 25769803776 * ((l + l / 4294967296 * -4294967296) / 3) + 36893488151714070528 * (((l + l / 4294967296 * -4294967296) / 3 * -3 + l + l / 4294967296 * -4294967296) / 4294967296) + n + 36893488151714070528 * (l / 4294967296) + 8569934592 <= 4294967296 * (n / 4294967296) + 8589934593 * l) && v4 <= 4294967296 * (l / 4294967296) + 4294967295)) || !(20000001 <= SIZE)) || ((((i + j + k + v4 <= l && 7 <= i + j + k + v4) && 4294967296 * (n / 4294967296) + l <= n + 4294967296 * ((i + j + k + v4 + -8) / 4294967296)) && l / 4294967296 <= 0) && l <= i + j + k + v4) - ProcedureContractResult [Line: 16]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 8]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32.7s, OverallIterations: 21, TraceHistogramMax: 9, AutomataDifference: 20.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 11.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 612 SDtfs, 2155 SDslu, 1857 SDs, 0 SdLazy, 6753 SolverSat, 476 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 543 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3607 ImplicationChecksByTransitivity, 19.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred 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, 21 MinimizatonAttempts, 189 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 45 LocationsWithAnnotation, 192 PreInvPairs, 298 NumberOfFragments, 2612 HoareAnnotationTreeSize, 192 FomulaSimplifications, 243494811 FormulaSimplificationTreeSizeReduction, 2.3s HoareSimplificationTime, 45 FomulaSimplificationsInter, 5591123 FormulaSimplificationTreeSizeReductionInter, 9.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 1008 NumberOfCodeBlocks, 1008 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 987 ConstructedInterpolants, 0 QuantifiedInterpolants, 593741 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 86/875 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...