/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/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:21:11,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:21:11,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:21:11,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:21:11,265 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 00:21:11,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:21:11,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:21:11,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:21:11,279 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:21:11,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:21:11,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:21:11,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:21:11,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:21:11,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:21:11,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:21:11,280 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:21:11,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:21:11,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:21:11,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:21:11,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:21:11,281 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:21:11,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:21:11,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:21:11,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:21:11,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:21:11,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:21:11,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:21:11,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:21:11,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:21:11,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:21:11,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:21:11,666 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:21:11,667 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:21:11,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2021-02-24 00:21:11,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2492d8f/aaed40b58fa64438b75dd08ca93889b2/FLAG7c31c42c1 [2021-02-24 00:21:12,315 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:21:12,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2021-02-24 00:21:12,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2492d8f/aaed40b58fa64438b75dd08ca93889b2/FLAG7c31c42c1 [2021-02-24 00:21:12,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f2492d8f/aaed40b58fa64438b75dd08ca93889b2 [2021-02-24 00:21:12,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:21:12,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:21:12,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:12,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:21:12,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:21:12,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:12" (1/1) ... [2021-02-24 00:21:12,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18c5655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12, skipping insertion in model container [2021-02-24 00:21:12,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:12" (1/1) ... [2021-02-24 00:21:12,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:21:12,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:21:12,898 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i[895,908] [2021-02-24 00:21:12,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:12,922 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:21:12,934 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i[895,908] [2021-02-24 00:21:12,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:12,951 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:21:12,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12 WrapperNode [2021-02-24 00:21:12,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:12,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:21:12,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:21:12,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:21:12,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12" (1/1) ... [2021-02-24 00:21:12,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12" (1/1) ... [2021-02-24 00:21:12,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12" (1/1) ... [2021-02-24 00:21:12,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12" (1/1) ... [2021-02-24 00:21:12,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12" (1/1) ... [2021-02-24 00:21:12,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12" (1/1) ... [2021-02-24 00:21:12,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12" (1/1) ... [2021-02-24 00:21:12,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:21:12,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:21:12,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:21:12,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:21:12,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12" (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 00:21:13,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:21:13,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:21:13,090 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:21:13,090 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:21:13,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:21:13,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:21:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:21:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:21:13,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 00:21:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 00:21:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:21:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:21:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:21:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:21:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:21:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:21:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:21:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:21:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:21:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:21:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:21:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:21:13,404 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:21:13,404 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:21:13,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:13 BoogieIcfgContainer [2021-02-24 00:21:13,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:21:13,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:21:13,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:21:13,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:21:13,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:21:12" (1/3) ... [2021-02-24 00:21:13,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a2bcdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:13, skipping insertion in model container [2021-02-24 00:21:13,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:12" (2/3) ... [2021-02-24 00:21:13,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a2bcdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:13, skipping insertion in model container [2021-02-24 00:21:13,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:13" (3/3) ... [2021-02-24 00:21:13,415 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2021-02-24 00:21:13,428 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:21:13,443 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:21:13,521 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:21:13,589 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:21:13,589 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:21:13,589 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:21:13,589 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:21:13,589 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:21:13,590 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:21:13,590 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:21:13,595 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:21:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-24 00:21:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 00:21:13,639 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:13,640 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] [2021-02-24 00:21:13,641 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:13,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1543512865, now seen corresponding path program 1 times [2021-02-24 00:21:13,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:13,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065325585] [2021-02-24 00:21:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:13,922 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:13,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:13,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:13,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:13,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:13,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:13,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:13,995 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 00:21:13,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065325585] [2021-02-24 00:21:13,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:13,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:21:13,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595278414] [2021-02-24 00:21:14,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:21:14,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:21:14,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:21:14,021 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-24 00:21:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:14,105 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-02-24 00:21:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:21:14,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-24 00:21:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:14,116 INFO L225 Difference]: With dead ends: 50 [2021-02-24 00:21:14,117 INFO L226 Difference]: Without dead ends: 31 [2021-02-24 00:21:14,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:21:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-24 00:21:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-24 00:21:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-24 00:21:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-02-24 00:21:14,173 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2021-02-24 00:21:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:14,174 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-02-24 00:21:14,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:21:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-02-24 00:21:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 00:21:14,175 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:14,175 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] [2021-02-24 00:21:14,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:21:14,176 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1557365680, now seen corresponding path program 1 times [2021-02-24 00:21:14,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:14,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554167487] [2021-02-24 00:21:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:14,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,262 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:14,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:14,284 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-24 00:21:14,287 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-24 00:21:14,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,301 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:14,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:14,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:14,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:14,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:14,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,405 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:14,407 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 00:21:14,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554167487] [2021-02-24 00:21:14,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:14,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 00:21:14,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916631751] [2021-02-24 00:21:14,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:21:14,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:21:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:21:14,417 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2021-02-24 00:21:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:14,793 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-02-24 00:21:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 00:21:14,794 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-02-24 00:21:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:14,796 INFO L225 Difference]: With dead ends: 46 [2021-02-24 00:21:14,796 INFO L226 Difference]: Without dead ends: 38 [2021-02-24 00:21:14,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:21:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-24 00:21:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-02-24 00:21:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-02-24 00:21:14,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-02-24 00:21:14,810 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2021-02-24 00:21:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:14,811 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-02-24 00:21:14,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:21:14,811 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-02-24 00:21:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-24 00:21:14,812 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:14,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:14,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:21:14,813 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:14,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2003455287, now seen corresponding path program 1 times [2021-02-24 00:21:14,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:14,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384099117] [2021-02-24 00:21:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:14,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:14,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:14,894 WARN L141 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size [2021-02-24 00:21:14,895 WARN L147 QuantifierPusher]: treesize reduction 12, result has 36.8 percent of original size 7 [2021-02-24 00:21:14,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:14,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:14,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:14,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:14,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:14,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:14,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:14,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384099117] [2021-02-24 00:21:14,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:14,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-24 00:21:14,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406250032] [2021-02-24 00:21:14,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:21:14,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:14,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:21:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:21:14,983 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 7 states. [2021-02-24 00:21:15,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:15,354 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-02-24 00:21:15,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:21:15,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2021-02-24 00:21:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:15,356 INFO L225 Difference]: With dead ends: 59 [2021-02-24 00:21:15,356 INFO L226 Difference]: Without dead ends: 57 [2021-02-24 00:21:15,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:21:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-24 00:21:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-02-24 00:21:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-24 00:21:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-02-24 00:21:15,373 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 27 [2021-02-24 00:21:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:15,373 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-02-24 00:21:15,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:21:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-02-24 00:21:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 00:21:15,375 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:15,375 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:15,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:21:15,375 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash -301995467, now seen corresponding path program 1 times [2021-02-24 00:21:15,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:15,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032958954] [2021-02-24 00:21:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:15,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:15,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:15,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:15,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:15,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:15,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:15,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:15,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:15,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-02-24 00:21:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:15,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:15,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032958954] [2021-02-24 00:21:15,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:15,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-02-24 00:21:15,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151659448] [2021-02-24 00:21:15,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:21:15,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:21:15,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:21:15,484 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 7 states. [2021-02-24 00:21:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:15,771 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-02-24 00:21:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:21:15,771 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2021-02-24 00:21:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:15,773 INFO L225 Difference]: With dead ends: 63 [2021-02-24 00:21:15,773 INFO L226 Difference]: Without dead ends: 51 [2021-02-24 00:21:15,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:21:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-24 00:21:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2021-02-24 00:21:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-24 00:21:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-02-24 00:21:15,784 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2021-02-24 00:21:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:15,785 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-02-24 00:21:15,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:21:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-02-24 00:21:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 00:21:15,786 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:15,786 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:15,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:21:15,787 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:15,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:15,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1635508665, now seen corresponding path program 1 times [2021-02-24 00:21:15,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:15,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912120499] [2021-02-24 00:21:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:15,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:15,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:15,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:15,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:15,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:15,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:15,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:15,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:15,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:15,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:15,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912120499] [2021-02-24 00:21:15,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:15,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-02-24 00:21:15,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518322665] [2021-02-24 00:21:15,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 00:21:15,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:15,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 00:21:15,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-24 00:21:15,899 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 8 states. [2021-02-24 00:21:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:16,289 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-02-24 00:21:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:21:16,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-24 00:21:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:16,292 INFO L225 Difference]: With dead ends: 51 [2021-02-24 00:21:16,292 INFO L226 Difference]: Without dead ends: 47 [2021-02-24 00:21:16,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-02-24 00:21:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-24 00:21:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-02-24 00:21:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-24 00:21:16,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-02-24 00:21:16,304 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 32 [2021-02-24 00:21:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:16,304 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-02-24 00:21:16,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 00:21:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-02-24 00:21:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-24 00:21:16,306 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:16,306 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:16,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 00:21:16,306 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash -899744393, now seen corresponding path program 1 times [2021-02-24 00:21:16,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:16,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713740811] [2021-02-24 00:21:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:16,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:16,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:16,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:21:16,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:16,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:16,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,364 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:16,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:16,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,396 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:16,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-24 00:21:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:16,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:16,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-24 00:21:16,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713740811] [2021-02-24 00:21:16,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:16,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 00:21:16,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541565050] [2021-02-24 00:21:16,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 00:21:16,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:16,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 00:21:16,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-24 00:21:16,408 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 7 states. [2021-02-24 00:21:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:16,678 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-02-24 00:21:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:21:16,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2021-02-24 00:21:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:16,679 INFO L225 Difference]: With dead ends: 50 [2021-02-24 00:21:16,679 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:21:16,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-24 00:21:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:21:16,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:21:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:21:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:21:16,681 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2021-02-24 00:21:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:16,681 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:21:16,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 00:21:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:21:16,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:21:16,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 00:21:16,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:21:17,576 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 17 [2021-02-24 00:21:17,798 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-24 00:21:17,798 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-24 00:21:17,799 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-24 00:21:17,799 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-24 00:21:17,799 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-24 00:21:17,799 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:17,799 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:17,799 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-24 00:21:17,800 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-24 00:21:17,800 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-24 00:21:17,800 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-24 00:21:17,800 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-24 00:21:17,800 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-24 00:21:17,800 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:21:17,800 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:21:17,801 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:17,801 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:21:17,801 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:21:17,801 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-24 00:21:17,801 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-24 00:21:17,801 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:21:17,801 INFO L189 CegarLoopUtils]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:21:17,802 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:21:17,802 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~m~0 0)) (.cse2 (<= (+ main_~x~0 1) main_~n~0))) (or (and .cse0 .cse1 .cse2) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0) .cse2) (and .cse1 (= main_~x~0 0) .cse2))) [2021-02-24 00:21:17,802 INFO L185 CegarLoopUtils]: At program point L29-1(lines 29 31) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~m~0 0)) (.cse2 (<= (+ main_~x~0 1) main_~n~0))) (or (and .cse0 .cse1 .cse2) (and .cse0 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0) .cse2) (and .cse1 (= main_~x~0 0) .cse2))) [2021-02-24 00:21:17,802 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (= main_~m~0 0) (= main_~x~0 0)) [2021-02-24 00:21:17,803 INFO L185 CegarLoopUtils]: At program point L29-2(line 29) the Hoare annotation is: (let ((.cse0 (<= (+ main_~x~0 1) main_~n~0))) (or (and (<= 1 main_~x~0) .cse0) (and (= main_~m~0 0) (= main_~x~0 0) .cse0))) [2021-02-24 00:21:17,803 INFO L185 CegarLoopUtils]: At program point L27-1(line 27) the Hoare annotation is: (and (= main_~m~0 0) (= main_~x~0 0)) [2021-02-24 00:21:17,803 INFO L185 CegarLoopUtils]: At program point L27-2(line 27) the Hoare annotation is: (and (= main_~m~0 0) (= main_~x~0 0)) [2021-02-24 00:21:17,803 INFO L185 CegarLoopUtils]: At program point L29-4(line 29) the Hoare annotation is: (let ((.cse1 (<= 1 main_~x~0)) (.cse2 (<= (+ main_~x~0 1) main_~n~0))) (or (and (let ((.cse0 (= main_~m~0 0))) (or (and .cse0 (= main_~x~0 0)) (and .cse1 .cse0))) .cse2) (and .cse1 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0) .cse2))) [2021-02-24 00:21:17,803 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 24 37) the Hoare annotation is: true [2021-02-24 00:21:17,804 INFO L185 CegarLoopUtils]: At program point L29-5(lines 29 31) the Hoare annotation is: (let ((.cse1 (<= 1 main_~x~0)) (.cse2 (<= (+ main_~x~0 1) main_~n~0))) (or (and (let ((.cse0 (= main_~m~0 0))) (or (and .cse0 (= main_~x~0 0)) (and .cse1 .cse0))) .cse2) (and .cse1 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0) .cse2))) [2021-02-24 00:21:17,804 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 24 37) the Hoare annotation is: true [2021-02-24 00:21:17,804 INFO L185 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (or (= main_~m~0 0) (and (<= 1 main_~x~0) (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0))) [2021-02-24 00:21:17,804 INFO L185 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~x~0 1) main_~n~0))) (or (and (<= 1 main_~x~0) .cse0) (and (= main_~m~0 0) (= main_~x~0 0) .cse0))) [2021-02-24 00:21:17,804 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 37) the Hoare annotation is: true [2021-02-24 00:21:17,804 INFO L185 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (= main_~x~0 0) [2021-02-24 00:21:17,805 INFO L185 CegarLoopUtils]: At program point L28-2(lines 28 33) the Hoare annotation is: (let ((.cse0 (= main_~m~0 0)) (.cse1 (<= 1 main_~x~0))) (or (and .cse0 (= main_~x~0 0)) (and .cse1 .cse0) (and .cse1 (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0)))) [2021-02-24 00:21:17,805 INFO L185 CegarLoopUtils]: At program point L28-3(lines 28 33) the Hoare annotation is: (or (= main_~m~0 0) (and (<= 1 main_~x~0) (<= (+ main_~m~0 1) main_~n~0) (<= 1 main_~m~0))) [2021-02-24 00:21:17,805 INFO L192 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: true [2021-02-24 00:21:17,805 INFO L185 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:21:17,805 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-24 00:21:17,805 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:21:17,806 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:21:17,806 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:21:17,806 INFO L185 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:21:17,806 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:21:17,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:21:17 BoogieIcfgContainer [2021-02-24 00:21:17,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:21:17,826 INFO L168 Benchmark]: Toolchain (without parser) took 5131.98 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 126.7 MB in the beginning and 64.7 MB in the end (delta: 62.0 MB). Peak memory consumption was 108.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:17,827 INFO L168 Benchmark]: CDTParser took 0.91 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:21:17,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.62 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:17,828 INFO L168 Benchmark]: Boogie Preprocessor took 34.77 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:17,829 INFO L168 Benchmark]: RCFGBuilder took 417.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 99.8 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:17,842 INFO L168 Benchmark]: TraceAbstraction took 4416.83 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 99.4 MB in the beginning and 64.7 MB in the end (delta: 34.6 MB). Peak memory consumption was 81.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:17,849 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.62 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.77 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 417.97 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 99.8 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4416.83 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 99.4 MB in the beginning and 64.7 MB in the end (delta: 34.6 MB). Peak memory consumption was 81.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((m == 0 && x == 0) || (1 <= x && m == 0)) || ((1 <= x && m + 1 <= n) && 1 <= m) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 193 SDtfs, 249 SDslu, 282 SDs, 0 SdLazy, 547 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 37 LocationsWithAnnotation, 86 PreInvPairs, 134 NumberOfFragments, 364 HoareAnnotationTreeSize, 86 FomulaSimplifications, 6909 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 37 FomulaSimplificationsInter, 1028 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 170 NumberOfCodeBlocks, 170 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 13882 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 10/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...