/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/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:35,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:35,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:35,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:35,875 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 00:16:35,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:35,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:35,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:35,895 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:35,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:35,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:35,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:35,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:35,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:35,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:35,897 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:35,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:35,897 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:35,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:35,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:35,898 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:35,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:35,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:35,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:35,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:35,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:35,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:35,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:36,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:36,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:36,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:36,380 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:36,381 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:36,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2021-02-24 00:16:36,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abff566f/66fabe85c85441dca7e80d0e1c91d258/FLAG7399838af [2021-02-24 00:16:37,112 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:37,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-1.c [2021-02-24 00:16:37,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abff566f/66fabe85c85441dca7e80d0e1c91d258/FLAG7399838af [2021-02-24 00:16:37,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abff566f/66fabe85c85441dca7e80d0e1c91d258 [2021-02-24 00:16:37,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:37,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:37,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:37,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:37,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:37,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:37" (1/1) ... [2021-02-24 00:16:37,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e7920c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37, skipping insertion in model container [2021-02-24 00:16:37,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:37" (1/1) ... [2021-02-24 00:16:37,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:37,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:37,737 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/invert_string-1.c[352,365] [2021-02-24 00:16:37,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:37,767 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:37,781 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/invert_string-1.c[352,365] [2021-02-24 00:16:37,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:37,812 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:37,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37 WrapperNode [2021-02-24 00:16:37,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:37,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:37,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:37,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:37,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37" (1/1) ... [2021-02-24 00:16:37,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37" (1/1) ... [2021-02-24 00:16:37,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37" (1/1) ... [2021-02-24 00:16:37,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37" (1/1) ... [2021-02-24 00:16:37,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37" (1/1) ... [2021-02-24 00:16:37,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37" (1/1) ... [2021-02-24 00:16:37,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37" (1/1) ... [2021-02-24 00:16:37,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:37,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:37,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:37,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:37,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37" (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 00:16:38,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:38,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:38,001 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:38,001 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:38,001 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-24 00:16:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-24 00:16:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:38,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:38,482 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-24 00:16:38,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:38 BoogieIcfgContainer [2021-02-24 00:16:38,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:38,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:38,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:38,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:38,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:37" (1/3) ... [2021-02-24 00:16:38,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3307f6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:38, skipping insertion in model container [2021-02-24 00:16:38,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:37" (2/3) ... [2021-02-24 00:16:38,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3307f6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:38, skipping insertion in model container [2021-02-24 00:16:38,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:38" (3/3) ... [2021-02-24 00:16:38,495 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2021-02-24 00:16:38,503 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:38,509 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:38,530 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:38,579 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:38,579 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:38,580 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:38,580 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:38,580 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:38,580 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:38,580 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:38,580 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2021-02-24 00:16:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:16:38,617 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:38,618 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, 1, 1, 1, 1, 1] [2021-02-24 00:16:38,618 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:38,625 INFO L82 PathProgramCache]: Analyzing trace with hash 56541078, now seen corresponding path program 1 times [2021-02-24 00:16:38,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:38,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721145557] [2021-02-24 00:16:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:38,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:38,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:38,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:38,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:38,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:39,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:39,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:39,081 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 00:16:39,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721145557] [2021-02-24 00:16:39,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:39,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:39,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038036690] [2021-02-24 00:16:39,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:39,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:39,127 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 3 states. [2021-02-24 00:16:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:39,506 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2021-02-24 00:16:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:39,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-24 00:16:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:39,519 INFO L225 Difference]: With dead ends: 127 [2021-02-24 00:16:39,520 INFO L226 Difference]: Without dead ends: 62 [2021-02-24 00:16:39,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:39,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-24 00:16:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-02-24 00:16:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-24 00:16:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-02-24 00:16:39,585 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 36 [2021-02-24 00:16:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:39,585 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-02-24 00:16:39,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-02-24 00:16:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:16:39,588 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:39,588 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, 1, 1, 1, 1, 1] [2021-02-24 00:16:39,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:39,589 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:39,590 INFO L82 PathProgramCache]: Analyzing trace with hash -221059569, now seen corresponding path program 1 times [2021-02-24 00:16:39,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:39,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527294412] [2021-02-24 00:16:39,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:39,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:39,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:39,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:39,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:39,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:39,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:39,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:39,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:39,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:39,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:39,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:39,846 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 00:16:39,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527294412] [2021-02-24 00:16:39,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:39,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:16:39,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633257911] [2021-02-24 00:16:39,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:16:39,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:39,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:16:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:16:39,855 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 5 states. [2021-02-24 00:16:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:40,202 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-02-24 00:16:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:16:40,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-24 00:16:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:40,206 INFO L225 Difference]: With dead ends: 112 [2021-02-24 00:16:40,206 INFO L226 Difference]: Without dead ends: 79 [2021-02-24 00:16:40,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-24 00:16:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-24 00:16:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-02-24 00:16:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-24 00:16:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-02-24 00:16:40,226 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 36 [2021-02-24 00:16:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:40,226 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-02-24 00:16:40,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:16:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-02-24 00:16:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-24 00:16:40,228 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:40,228 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:40,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:40,229 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:40,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1628001064, now seen corresponding path program 1 times [2021-02-24 00:16:40,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:40,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714183318] [2021-02-24 00:16:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:40,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:40,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:40,287 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:40,288 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:40,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:40,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:40,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:40,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:40,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:40,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:40,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-24 00:16:40,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714183318] [2021-02-24 00:16:40,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:40,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:16:40,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096934197] [2021-02-24 00:16:40,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:16:40,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:16:40,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:16:40,404 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 5 states. [2021-02-24 00:16:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:40,726 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-02-24 00:16:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:16:40,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-02-24 00:16:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:40,729 INFO L225 Difference]: With dead ends: 100 [2021-02-24 00:16:40,729 INFO L226 Difference]: Without dead ends: 80 [2021-02-24 00:16:40,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 00:16:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-24 00:16:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2021-02-24 00:16:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-24 00:16:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-02-24 00:16:40,745 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 43 [2021-02-24 00:16:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:40,746 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-02-24 00:16:40,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:16:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-02-24 00:16:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-24 00:16:40,748 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:40,748 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, 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 00:16:40,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:40,749 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash -398128882, now seen corresponding path program 1 times [2021-02-24 00:16:40,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:40,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669565291] [2021-02-24 00:16:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:40,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:40,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:41,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:41,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 00:16:41,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 00:16:41,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:41,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:41,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:41,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:41,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:41,205 WARN L141 QuantifierPusher]: treesize reduction 28, result has 41.7 percent of original size [2021-02-24 00:16:41,207 WARN L147 QuantifierPusher]: treesize reduction 28, result has 41.7 percent of original size 20 [2021-02-24 00:16:41,246 WARN L141 QuantifierPusher]: treesize reduction 20, result has 72.2 percent of original size [2021-02-24 00:16:41,248 WARN L147 QuantifierPusher]: treesize reduction 20, result has 72.2 percent of original size 52 [2021-02-24 00:16:41,328 WARN L141 QuantifierPusher]: treesize reduction 21, result has 65.6 percent of original size [2021-02-24 00:16:41,330 WARN L147 QuantifierPusher]: treesize reduction 21, result has 65.6 percent of original size 40 [2021-02-24 00:16:41,415 WARN L141 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size [2021-02-24 00:16:41,417 WARN L147 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size 28 [2021-02-24 00:16:41,469 WARN L141 QuantifierPusher]: treesize reduction 25, result has 69.5 percent of original size [2021-02-24 00:16:41,471 WARN L147 QuantifierPusher]: treesize reduction 25, result has 69.5 percent of original size 57 [2021-02-24 00:16:41,542 WARN L141 QuantifierPusher]: treesize reduction 44, result has 60.7 percent of original size [2021-02-24 00:16:41,544 WARN L147 QuantifierPusher]: treesize reduction 44, result has 60.7 percent of original size 68 [2021-02-24 00:16:41,626 WARN L141 QuantifierPusher]: treesize reduction 21, result has 68.7 percent of original size [2021-02-24 00:16:41,628 WARN L147 QuantifierPusher]: treesize reduction 21, result has 68.7 percent of original size 46 [2021-02-24 00:16:41,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:41,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,705 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:41,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:41,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:41,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:41,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:41,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:41,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669565291] [2021-02-24 00:16:41,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:41,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-02-24 00:16:41,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165461487] [2021-02-24 00:16:41,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-24 00:16:41,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-24 00:16:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:16:41,852 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 20 states. [2021-02-24 00:16:43,480 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-02-24 00:16:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:44,135 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2021-02-24 00:16:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-24 00:16:44,136 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2021-02-24 00:16:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:44,144 INFO L225 Difference]: With dead ends: 169 [2021-02-24 00:16:44,144 INFO L226 Difference]: Without dead ends: 167 [2021-02-24 00:16:44,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-02-24 00:16:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-24 00:16:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 95. [2021-02-24 00:16:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-02-24 00:16:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-02-24 00:16:44,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 53 [2021-02-24 00:16:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:44,210 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-02-24 00:16:44,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-24 00:16:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-02-24 00:16:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-24 00:16:44,216 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:44,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:44,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:16:44,217 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1012224277, now seen corresponding path program 2 times [2021-02-24 00:16:44,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:44,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238310240] [2021-02-24 00:16:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:44,277 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:44,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:44,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:44,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:44,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:44,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:44,317 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,318 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:44,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:44,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:44,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:44,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:44,418 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:44,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238310240] [2021-02-24 00:16:44,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:44,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-02-24 00:16:44,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436120329] [2021-02-24 00:16:44,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:16:44,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:44,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:16:44,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:16:44,426 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 9 states. [2021-02-24 00:16:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:45,107 INFO L93 Difference]: Finished difference Result 176 states and 185 transitions. [2021-02-24 00:16:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-24 00:16:45,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2021-02-24 00:16:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:45,112 INFO L225 Difference]: With dead ends: 176 [2021-02-24 00:16:45,112 INFO L226 Difference]: Without dead ends: 156 [2021-02-24 00:16:45,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-02-24 00:16:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-24 00:16:45,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 105. [2021-02-24 00:16:45,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-02-24 00:16:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-02-24 00:16:45,156 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 60 [2021-02-24 00:16:45,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:45,157 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-02-24 00:16:45,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:16:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-02-24 00:16:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-24 00:16:45,159 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:45,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:45,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:16:45,159 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:45,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:45,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1503336308, now seen corresponding path program 3 times [2021-02-24 00:16:45,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:45,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067262182] [2021-02-24 00:16:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:45,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,218 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:45,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:45,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:45,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:45,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:45,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:45,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:45,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:45,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:45,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:45,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:45,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:45,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067262182] [2021-02-24 00:16:45,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:45,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:16:45,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218687015] [2021-02-24 00:16:45,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:16:45,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:45,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:16:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:16:45,405 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 10 states. [2021-02-24 00:16:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:46,006 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2021-02-24 00:16:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-24 00:16:46,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2021-02-24 00:16:46,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:46,009 INFO L225 Difference]: With dead ends: 170 [2021-02-24 00:16:46,009 INFO L226 Difference]: Without dead ends: 140 [2021-02-24 00:16:46,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-02-24 00:16:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-02-24 00:16:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2021-02-24 00:16:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-02-24 00:16:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2021-02-24 00:16:46,029 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 63 [2021-02-24 00:16:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:46,029 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2021-02-24 00:16:46,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:16:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2021-02-24 00:16:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-24 00:16:46,031 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:46,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:46,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:16:46,032 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash 600609810, now seen corresponding path program 1 times [2021-02-24 00:16:46,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:46,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7632275] [2021-02-24 00:16:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:46,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:46,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:46,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:46,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:46,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:46,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:46,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,144 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:46,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:46,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:46,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:46,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:46,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-02-24 00:16:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:46,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,277 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-24 00:16:46,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7632275] [2021-02-24 00:16:46,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:46,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-02-24 00:16:46,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582908953] [2021-02-24 00:16:46,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 00:16:46,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 00:16:46,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-24 00:16:46,290 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 10 states. [2021-02-24 00:16:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:46,805 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2021-02-24 00:16:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-24 00:16:46,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2021-02-24 00:16:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:46,809 INFO L225 Difference]: With dead ends: 148 [2021-02-24 00:16:46,809 INFO L226 Difference]: Without dead ends: 97 [2021-02-24 00:16:46,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-24 00:16:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-24 00:16:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2021-02-24 00:16:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-02-24 00:16:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-02-24 00:16:46,825 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 69 [2021-02-24 00:16:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:46,825 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-02-24 00:16:46,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 00:16:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-02-24 00:16:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-02-24 00:16:46,829 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:46,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:46,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 00:16:46,830 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1043481275, now seen corresponding path program 4 times [2021-02-24 00:16:46,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:46,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029078915] [2021-02-24 00:16:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:46,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:46,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:46,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:16:47,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 00:16:47,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 00:16:47,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-24 00:16:47,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,071 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:47,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:47,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:47,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:47,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:16:47,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 00:16:47,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:47,290 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 00:16:47,353 WARN L141 QuantifierPusher]: treesize reduction 26, result has 60.6 percent of original size [2021-02-24 00:16:47,356 WARN L147 QuantifierPusher]: treesize reduction 26, result has 60.6 percent of original size 40 [2021-02-24 00:16:47,460 WARN L141 QuantifierPusher]: treesize reduction 17, result has 76.7 percent of original size [2021-02-24 00:16:47,462 WARN L147 QuantifierPusher]: treesize reduction 17, result has 76.7 percent of original size 56 [2021-02-24 00:16:47,604 WARN L141 QuantifierPusher]: treesize reduction 17, result has 78.5 percent of original size [2021-02-24 00:16:47,606 WARN L147 QuantifierPusher]: treesize reduction 17, result has 78.5 percent of original size 62 [2021-02-24 00:16:47,717 WARN L141 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size [2021-02-24 00:16:47,718 WARN L147 QuantifierPusher]: treesize reduction 13, result has 68.3 percent of original size 28 [2021-02-24 00:16:47,776 WARN L141 QuantifierPusher]: treesize reduction 25, result has 69.1 percent of original size [2021-02-24 00:16:47,777 WARN L147 QuantifierPusher]: treesize reduction 25, result has 69.1 percent of original size 56 [2021-02-24 00:16:47,888 WARN L141 QuantifierPusher]: treesize reduction 44, result has 60.4 percent of original size [2021-02-24 00:16:47,902 WARN L147 QuantifierPusher]: treesize reduction 44, result has 60.4 percent of original size 67 [2021-02-24 00:16:48,027 WARN L141 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size [2021-02-24 00:16:48,030 WARN L147 QuantifierPusher]: treesize reduction 21, result has 68.2 percent of original size 45 [2021-02-24 00:16:48,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:48,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:48,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:48,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:48,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:48,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:48,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:48,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:48,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:48,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:48,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:48,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029078915] [2021-02-24 00:16:48,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:48,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-02-24 00:16:48,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957985265] [2021-02-24 00:16:48,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-24 00:16:48,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-24 00:16:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-02-24 00:16:48,364 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 24 states. [2021-02-24 00:16:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:51,705 INFO L93 Difference]: Finished difference Result 196 states and 205 transitions. [2021-02-24 00:16:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-24 00:16:51,706 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2021-02-24 00:16:51,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:51,708 INFO L225 Difference]: With dead ends: 196 [2021-02-24 00:16:51,708 INFO L226 Difference]: Without dead ends: 194 [2021-02-24 00:16:51,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-02-24 00:16:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-24 00:16:51,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 122. [2021-02-24 00:16:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-02-24 00:16:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-02-24 00:16:51,732 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 70 [2021-02-24 00:16:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:51,732 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-02-24 00:16:51,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-02-24 00:16:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-02-24 00:16:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-02-24 00:16:51,733 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:51,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:51,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 00:16:51,734 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:51,735 INFO L82 PathProgramCache]: Analyzing trace with hash -206034540, now seen corresponding path program 5 times [2021-02-24 00:16:51,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:51,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398526575] [2021-02-24 00:16:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:51,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:51,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,783 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,791 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,800 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,863 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,864 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:51,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:51,966 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:51,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:51,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398526575] [2021-02-24 00:16:51,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:51,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:16:51,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123373991] [2021-02-24 00:16:51,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:16:51,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:16:51,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:16:51,977 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 12 states. [2021-02-24 00:16:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:53,009 INFO L93 Difference]: Finished difference Result 198 states and 207 transitions. [2021-02-24 00:16:53,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-24 00:16:53,010 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2021-02-24 00:16:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:53,012 INFO L225 Difference]: With dead ends: 198 [2021-02-24 00:16:53,013 INFO L226 Difference]: Without dead ends: 178 [2021-02-24 00:16:53,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-02-24 00:16:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-24 00:16:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2021-02-24 00:16:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-02-24 00:16:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-02-24 00:16:53,037 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 77 [2021-02-24 00:16:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:53,038 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-02-24 00:16:53,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:16:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-02-24 00:16:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-02-24 00:16:53,039 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:53,039 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:53,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-24 00:16:53,039 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:53,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1973542113, now seen corresponding path program 6 times [2021-02-24 00:16:53,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:53,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039604847] [2021-02-24 00:16:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:53,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,075 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:53,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:53,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:53,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:53,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:53,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:53,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:53,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039604847] [2021-02-24 00:16:53,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:53,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-02-24 00:16:53,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100326462] [2021-02-24 00:16:53,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-24 00:16:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-24 00:16:53,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:16:53,257 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 13 states. [2021-02-24 00:16:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:54,098 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2021-02-24 00:16:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-24 00:16:54,099 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2021-02-24 00:16:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:54,101 INFO L225 Difference]: With dead ends: 197 [2021-02-24 00:16:54,101 INFO L226 Difference]: Without dead ends: 167 [2021-02-24 00:16:54,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-02-24 00:16:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-24 00:16:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2021-02-24 00:16:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-02-24 00:16:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2021-02-24 00:16:54,124 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 80 [2021-02-24 00:16:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:54,124 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2021-02-24 00:16:54,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-02-24 00:16:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2021-02-24 00:16:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-02-24 00:16:54,126 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:54,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:16:54,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-24 00:16:54,126 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1425200063, now seen corresponding path program 2 times [2021-02-24 00:16:54,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:54,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769091173] [2021-02-24 00:16:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:54,152 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:16:54,175 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:16:54,212 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:16:54,213 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:54,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-24 00:16:54,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:54 BoogieIcfgContainer [2021-02-24 00:16:54,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:54,316 INFO L168 Benchmark]: Toolchain (without parser) took 16837.08 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.7 MB in the beginning and 108.6 MB in the end (delta: 19.1 MB). Peak memory consumption was 87.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:54,319 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.3 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:54,320 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.35 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:54,320 INFO L168 Benchmark]: Boogie Preprocessor took 78.49 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:54,320 INFO L168 Benchmark]: RCFGBuilder took 591.52 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 128.0 MB in the end (delta: -12.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:54,321 INFO L168 Benchmark]: TraceAbstraction took 15828.10 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.4 MB in the beginning and 108.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 86.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:54,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.3 MB in the end (delta: 436.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 315.35 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 78.49 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 591.52 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 128.0 MB in the end (delta: -12.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15828.10 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.4 MB in the beginning and 108.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 86.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=2, MAX=2] [L17] COND FALSE !(!(MAX > 0)) VAL [MAX=2] [L18] char str1[MAX], str2[MAX]; VAL [MAX=2, str1={7:0}, str2={3:0}] [L19] int cont, i, j; VAL [MAX=2, str1={7:0}, str2={3:0}] [L20] cont = 0 VAL [cont=0, MAX=2, str1={7:0}, str2={3:0}] [L22] i=0 VAL [cont=0, i=0, MAX=2, str1={7:0}, str2={3:0}] [L22] COND TRUE i= 0 VAL [cont=0, i=1, j=0, MAX=2, str1={7:0}, str2={3:0}] [L30] EXPR str1[0] VAL [cont=0, i=1, j=0, MAX=2, str1={7:0}, str1[0]=-1, str2={3:0}] [L30] str2[j] = str1[0] VAL [cont=0, i=1, j=0, MAX=2, str1={7:0}, str1[0]=-1, str2={3:0}] [L31] j++ VAL [cont=0, i=1, j=1, MAX=2, str1={7:0}, str2={3:0}] [L29] i-- VAL [cont=0, i=0, j=1, MAX=2, str1={7:0}, str2={3:0}] [L29] COND TRUE i >= 0 VAL [cont=0, i=0, j=1, MAX=2, str1={7:0}, str2={3:0}] [L30] EXPR str1[0] VAL [cont=0, i=0, j=1, MAX=2, str1={7:0}, str1[0]=-1, str2={3:0}] [L30] str2[j] = str1[0] VAL [cont=0, i=0, j=1, MAX=2, str1={7:0}, str1[0]=-1, str2={3:0}] [L31] j++ VAL [cont=0, i=0, j=2, MAX=2, str1={7:0}, str2={3:0}] [L29] i-- VAL [cont=0, i=-1, j=2, MAX=2, str1={7:0}, str2={3:0}] [L29] COND FALSE !(i >= 0) VAL [cont=0, i=-1, j=2, MAX=2, str1={7:0}, str2={3:0}] [L34] j = MAX-1 VAL [cont=0, i=-1, j=1, MAX=2, str1={7:0}, str2={3:0}] [L35] i=0 VAL [cont=0, i=0, j=1, MAX=2, str1={7:0}, str2={3:0}] [L35] COND TRUE i