/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:27:18,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:27:18,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:27:18,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:27:18,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:27:18,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:27:18,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:27:18,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:27:18,850 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:27:18,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:27:18,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:27:18,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:27:18,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:27:18,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:27:18,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:27:18,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:27:18,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:27:18,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:27:18,868 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:27:18,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:27:18,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:27:18,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:27:18,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:27:18,871 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:27:18,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:27:18,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:27:18,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:27:18,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:27:18,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:27:18,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:27:18,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:27:19,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:27:19,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:27:19,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:27:19,789 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:27:19,791 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:27:19,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2021-02-21 21:27:19,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e5b0025c/c4fee64e0dc444e8bde71571398cf7b1/FLAGdce352b71 [2021-02-21 21:27:20,977 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:27:20,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2021-02-21 21:27:20,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e5b0025c/c4fee64e0dc444e8bde71571398cf7b1/FLAGdce352b71 [2021-02-21 21:27:21,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e5b0025c/c4fee64e0dc444e8bde71571398cf7b1 [2021-02-21 21:27:21,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:27:21,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:27:21,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:27:21,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:27:21,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:27:21,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:27:21" (1/1) ... [2021-02-21 21:27:21,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c1b1b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21, skipping insertion in model container [2021-02-21 21:27:21,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:27:21" (1/1) ... [2021-02-21 21:27:21,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:27:21,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:27:21,378 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/ddlm2013.i[895,908] [2021-02-21 21:27:21,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:27:21,431 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:27:21,460 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/ddlm2013.i[895,908] [2021-02-21 21:27:21,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:27:21,503 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:27:21,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21 WrapperNode [2021-02-21 21:27:21,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:27:21,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:27:21,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:27:21,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:27:21,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21" (1/1) ... [2021-02-21 21:27:21,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21" (1/1) ... [2021-02-21 21:27:21,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21" (1/1) ... [2021-02-21 21:27:21,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21" (1/1) ... [2021-02-21 21:27:21,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21" (1/1) ... [2021-02-21 21:27:21,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21" (1/1) ... [2021-02-21 21:27:21,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21" (1/1) ... [2021-02-21 21:27:21,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:27:21,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:27:21,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:27:21,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:27:21,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21" (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 [2021-02-21 21:27:21,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:27:21,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:27:21,802 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:27:21,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 21:27:21,803 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:27:21,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:27:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:27:21,804 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:27:21,805 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 21:27:21,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 21:27:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:27:21,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:27:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 21:27:21,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:27:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:27:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:27:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:27:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:27:21,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:27:21,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:27:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:27:21,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:27:22,859 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:27:22,859 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:27:22,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:27:22 BoogieIcfgContainer [2021-02-21 21:27:22,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:27:22,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:27:22,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:27:22,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:27:22,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:27:21" (1/3) ... [2021-02-21 21:27:22,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc6fe1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:27:22, skipping insertion in model container [2021-02-21 21:27:22,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:27:21" (2/3) ... [2021-02-21 21:27:22,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc6fe1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:27:22, skipping insertion in model container [2021-02-21 21:27:22,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:27:22" (3/3) ... [2021-02-21 21:27:22,882 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2021-02-21 21:27:22,894 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:27:22,903 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:27:22,947 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:27:22,993 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:27:22,993 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:27:22,994 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:27:22,994 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:27:22,994 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:27:22,994 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:27:22,994 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:27:22,995 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:27:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2021-02-21 21:27:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 21:27:23,052 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:23,054 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] [2021-02-21 21:27:23,055 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:23,072 INFO L82 PathProgramCache]: Analyzing trace with hash 938281063, now seen corresponding path program 1 times [2021-02-21 21:27:23,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:23,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748698442] [2021-02-21 21:27:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:23,252 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:27:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:23,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:23,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:23,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:23,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:23,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:23,593 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:23,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:23,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748698442] [2021-02-21 21:27:23,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:23,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:27:23,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74415112] [2021-02-21 21:27:23,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:27:23,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:23,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:27:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:27:23,676 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2021-02-21 21:27:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:24,033 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-02-21 21:27:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:27:24,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2021-02-21 21:27:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:24,063 INFO L225 Difference]: With dead ends: 65 [2021-02-21 21:27:24,064 INFO L226 Difference]: Without dead ends: 44 [2021-02-21 21:27:24,073 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 [2021-02-21 21:27:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-02-21 21:27:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-02-21 21:27:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-02-21 21:27:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-02-21 21:27:24,166 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2021-02-21 21:27:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:24,167 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-02-21 21:27:24,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:27:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-02-21 21:27:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:27:24,170 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:24,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:27:24,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:27:24,172 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1407892642, now seen corresponding path program 1 times [2021-02-21 21:27:24,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:24,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487594670] [2021-02-21 21:27:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:24,180 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:27:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:24,346 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:24,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:24,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:24,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:27:24,368 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:24,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:24,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:24,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:24,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:24,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487594670] [2021-02-21 21:27:24,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:24,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:27:24,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239342223] [2021-02-21 21:27:24,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:27:24,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:24,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:27:24,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:27:24,547 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 4 states. [2021-02-21 21:27:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:24,852 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-02-21 21:27:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:27:24,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-02-21 21:27:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:24,862 INFO L225 Difference]: With dead ends: 64 [2021-02-21 21:27:24,863 INFO L226 Difference]: Without dead ends: 43 [2021-02-21 21:27:24,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:27:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-21 21:27:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-02-21 21:27:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-21 21:27:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-02-21 21:27:24,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2021-02-21 21:27:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:24,917 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-02-21 21:27:24,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:27:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-02-21 21:27:24,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:27:24,923 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:24,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:27:24,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:27:24,924 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:24,931 INFO L82 PathProgramCache]: Analyzing trace with hash 309043966, now seen corresponding path program 1 times [2021-02-21 21:27:24,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:24,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070961651] [2021-02-21 21:27:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:24,947 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:27:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:25,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:25,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:25,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:25,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:27:25,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:25,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:27:25,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:25,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:25,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:25,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:25,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:25,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:25,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:25,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:25,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:25,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070961651] [2021-02-21 21:27:25,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:25,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 21:27:25,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273929281] [2021-02-21 21:27:25,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 21:27:25,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:25,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 21:27:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:27:25,262 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 7 states. [2021-02-21 21:27:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:25,815 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-02-21 21:27:25,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 21:27:25,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-02-21 21:27:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:25,818 INFO L225 Difference]: With dead ends: 55 [2021-02-21 21:27:25,818 INFO L226 Difference]: Without dead ends: 48 [2021-02-21 21:27:25,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-21 21:27:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-21 21:27:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-02-21 21:27:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-21 21:27:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-02-21 21:27:25,836 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 31 [2021-02-21 21:27:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:25,836 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-02-21 21:27:25,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 21:27:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-02-21 21:27:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-21 21:27:25,838 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:25,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:27:25,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:27:25,839 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash -441562392, now seen corresponding path program 1 times [2021-02-21 21:27:25,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:25,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99789375] [2021-02-21 21:27:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:25,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:26,034 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:27:26,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:26,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:27:28,167 WARN L141 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-02-21 21:27:28,183 WARN L147 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size 36 [2021-02-21 21:27:28,215 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:28,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:27:31,235 WARN L202 SmtUtils]: Spent 986.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-21 21:27:31,245 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-21 21:27:31,256 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-21 21:27:33,330 WARN L141 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-02-21 21:27:33,338 WARN L147 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size 36 [2021-02-21 21:27:33,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:33,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:27:33,393 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:27:33,399 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:27:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:33,739 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:33,740 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:33,744 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:33,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:27:33,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:33,766 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:27:33,781 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-21 21:27:33,783 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-21 21:27:33,803 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-21 21:27:33,806 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-21 21:27:33,834 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-21 21:27:33,836 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-21 21:27:33,879 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size [2021-02-21 21:27:33,882 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size 16 [2021-02-21 21:27:33,951 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.4 percent of original size [2021-02-21 21:27:33,958 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.4 percent of original size 125 [2021-02-21 21:27:34,092 WARN L141 QuantifierPusher]: treesize reduction 6, result has 95.2 percent of original size [2021-02-21 21:27:34,096 WARN L147 QuantifierPusher]: treesize reduction 6, result has 95.2 percent of original size 118 [2021-02-21 21:27:34,234 WARN L141 QuantifierPusher]: treesize reduction 4, result has 96.1 percent of original size [2021-02-21 21:27:34,240 WARN L147 QuantifierPusher]: treesize reduction 4, result has 96.1 percent of original size 99 [2021-02-21 21:27:34,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:34,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:34,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:34,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:34,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:34,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:34,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:34,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:34,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99789375] [2021-02-21 21:27:34,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:34,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 21:27:34,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692589623] [2021-02-21 21:27:34,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 21:27:34,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:34,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 21:27:34,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-02-21 21:27:34,509 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 14 states. [2021-02-21 21:27:35,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:35,770 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-02-21 21:27:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 21:27:35,772 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2021-02-21 21:27:35,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:35,774 INFO L225 Difference]: With dead ends: 68 [2021-02-21 21:27:35,774 INFO L226 Difference]: Without dead ends: 61 [2021-02-21 21:27:35,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-02-21 21:27:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-21 21:27:35,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-02-21 21:27:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-21 21:27:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-02-21 21:27:35,852 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 41 [2021-02-21 21:27:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:35,854 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-02-21 21:27:35,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 21:27:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-02-21 21:27:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-21 21:27:35,857 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:35,857 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2021-02-21 21:27:35,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:27:35,862 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:35,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1477940818, now seen corresponding path program 2 times [2021-02-21 21:27:35,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:35,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719431951] [2021-02-21 21:27:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:35,940 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:27:35,943 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:27:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:36,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:36,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:27:36,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:27:36,291 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-21 21:27:36,293 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-21 21:27:36,314 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-21 21:27:36,322 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-21 21:27:36,353 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-21 21:27:36,355 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-21 21:27:36,379 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size [2021-02-21 21:27:36,382 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size 16 [2021-02-21 21:27:36,415 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size [2021-02-21 21:27:36,417 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size 23 [2021-02-21 21:27:36,450 WARN L141 QuantifierPusher]: treesize reduction 2, result has 90.9 percent of original size [2021-02-21 21:27:36,457 WARN L147 QuantifierPusher]: treesize reduction 2, result has 90.9 percent of original size 20 [2021-02-21 21:27:36,484 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:36,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:36,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:27:36,631 WARN L141 QuantifierPusher]: treesize reduction 4, result has 96.1 percent of original size [2021-02-21 21:27:36,643 WARN L147 QuantifierPusher]: treesize reduction 4, result has 96.1 percent of original size 99 [2021-02-21 21:27:36,777 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,778 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:36,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:36,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:36,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:36,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:36,915 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:36,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719431951] [2021-02-21 21:27:36,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:36,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-02-21 21:27:36,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013592929] [2021-02-21 21:27:36,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-21 21:27:36,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:36,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-21 21:27:36,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-02-21 21:27:36,932 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2021-02-21 21:27:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:38,616 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-02-21 21:27:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 21:27:38,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2021-02-21 21:27:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:38,620 INFO L225 Difference]: With dead ends: 101 [2021-02-21 21:27:38,621 INFO L226 Difference]: Without dead ends: 71 [2021-02-21 21:27:38,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-02-21 21:27:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-02-21 21:27:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-02-21 21:27:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-21 21:27:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-02-21 21:27:38,648 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 51 [2021-02-21 21:27:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:38,649 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-02-21 21:27:38,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-02-21 21:27:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-02-21 21:27:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-21 21:27:38,652 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:38,652 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:27:38,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 21:27:38,653 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:38,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:38,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1112614204, now seen corresponding path program 3 times [2021-02-21 21:27:38,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:38,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42639141] [2021-02-21 21:27:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:38,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:38,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:27:40,827 WARN L141 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-02-21 21:27:40,835 WARN L147 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size 36 [2021-02-21 21:27:40,836 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:27:40,838 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:27:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:40,983 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:40,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:40,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:40,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:27:40,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:27:41,014 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-21 21:27:41,016 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-21 21:27:41,033 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-21 21:27:41,035 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-21 21:27:41,057 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-21 21:27:41,059 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-21 21:27:41,078 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size [2021-02-21 21:27:41,080 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size 16 [2021-02-21 21:27:41,106 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size [2021-02-21 21:27:41,109 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size 23 [2021-02-21 21:27:41,141 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.3 percent of original size [2021-02-21 21:27:41,143 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.3 percent of original size 24 [2021-02-21 21:27:41,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:41,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:41,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:41,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:41,312 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,314 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:41,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,348 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:41,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:41,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:27:41,433 WARN L141 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size [2021-02-21 21:27:41,436 WARN L147 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size 84 [2021-02-21 21:27:41,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:41,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:41,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:41,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:41,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:41,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:41,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42639141] [2021-02-21 21:27:41,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:41,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-02-21 21:27:41,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284376291] [2021-02-21 21:27:41,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-21 21:27:41,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:41,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-21 21:27:41,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-02-21 21:27:41,745 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 21 states. [2021-02-21 21:27:43,085 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-02-21 21:27:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:44,385 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-02-21 21:27:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-21 21:27:44,387 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2021-02-21 21:27:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:44,393 INFO L225 Difference]: With dead ends: 93 [2021-02-21 21:27:44,394 INFO L226 Difference]: Without dead ends: 86 [2021-02-21 21:27:44,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2021-02-21 21:27:44,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-21 21:27:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-02-21 21:27:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-21 21:27:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-02-21 21:27:44,460 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 61 [2021-02-21 21:27:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:44,463 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-02-21 21:27:44,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-21 21:27:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-02-21 21:27:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-21 21:27:44,471 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:44,472 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:27:44,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 21:27:44,478 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:44,479 INFO L82 PathProgramCache]: Analyzing trace with hash -151367043, now seen corresponding path program 1 times [2021-02-21 21:27:44,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:44,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838492597] [2021-02-21 21:27:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:44,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:44,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:27:46,791 WARN L141 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-02-21 21:27:46,800 WARN L147 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size 36 [2021-02-21 21:27:46,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:46,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:27:46,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:46,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:27:46,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:46,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:27:49,353 WARN L202 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-21 21:27:49,364 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-21 21:27:49,375 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-21 21:27:49,377 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:27:49,383 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:27:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:49,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:49,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:49,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:49,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:27:49,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:49,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:27:49,604 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-21 21:27:49,607 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-21 21:27:49,640 WARN L141 QuantifierPusher]: treesize reduction 15, result has 51.6 percent of original size [2021-02-21 21:27:49,642 WARN L147 QuantifierPusher]: treesize reduction 15, result has 51.6 percent of original size 16 [2021-02-21 21:27:49,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:49,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:49,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:49,692 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:49,694 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:49,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838492597] [2021-02-21 21:27:49,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:49,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 21:27:49,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093061077] [2021-02-21 21:27:49,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 21:27:49,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 21:27:49,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 21:27:49,705 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 6 states. [2021-02-21 21:27:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:50,002 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-02-21 21:27:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 21:27:50,003 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2021-02-21 21:27:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:50,005 INFO L225 Difference]: With dead ends: 97 [2021-02-21 21:27:50,005 INFO L226 Difference]: Without dead ends: 72 [2021-02-21 21:27:50,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-21 21:27:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-21 21:27:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-02-21 21:27:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-02-21 21:27:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-02-21 21:27:50,028 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 63 [2021-02-21 21:27:50,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:50,029 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-02-21 21:27:50,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 21:27:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-02-21 21:27:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-21 21:27:50,030 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:27:50,031 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:27:50,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 21:27:50,031 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:27:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:27:50,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1836881830, now seen corresponding path program 4 times [2021-02-21 21:27:50,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:27:50,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74152042] [2021-02-21 21:27:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:27:50,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:50,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-21 21:27:50,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:50,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 21:27:53,182 WARN L202 SmtUtils]: Spent 966.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-02-21 21:27:53,189 WARN L141 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size [2021-02-21 21:27:53,194 WARN L147 QuantifierPusher]: treesize reduction 14, result has 69.6 percent of original size 32 [2021-02-21 21:27:55,231 WARN L141 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size [2021-02-21 21:27:55,238 WARN L147 QuantifierPusher]: treesize reduction 10, result has 78.3 percent of original size 36 [2021-02-21 21:27:55,240 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:27:55,242 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:27:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:55,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:55,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:27:55,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:27:55,422 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-21 21:27:55,425 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-21 21:27:55,454 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-21 21:27:55,455 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-21 21:27:55,480 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-21 21:27:55,481 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-21 21:27:55,503 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size [2021-02-21 21:27:55,504 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size 16 [2021-02-21 21:27:55,531 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size [2021-02-21 21:27:55,533 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.0 percent of original size 23 [2021-02-21 21:27:55,571 WARN L141 QuantifierPusher]: treesize reduction 2, result has 92.3 percent of original size [2021-02-21 21:27:55,577 WARN L147 QuantifierPusher]: treesize reduction 2, result has 92.3 percent of original size 24 [2021-02-21 21:27:55,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:55,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:55,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:55,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:55,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:55,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:55,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:55,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-21 21:27:55,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:55,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:55,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:56,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:56,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:56,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:56,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-21 21:27:56,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:56,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:27:56,177 WARN L141 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size [2021-02-21 21:27:56,187 WARN L147 QuantifierPusher]: treesize reduction 19, result has 81.6 percent of original size 84 [2021-02-21 21:27:56,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:56,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:56,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:56,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 21:27:56,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:56,433 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:56,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:27:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:27:56,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:27:56,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:27:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:27:56,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74152042] [2021-02-21 21:27:56,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:27:56,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-02-21 21:27:56,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253461728] [2021-02-21 21:27:56,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-21 21:27:56,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:27:56,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-21 21:27:56,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-02-21 21:27:56,626 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 25 states. [2021-02-21 21:27:57,948 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-02-21 21:27:58,198 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-02-21 21:27:58,404 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-02-21 21:27:58,609 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-02-21 21:27:58,771 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-02-21 21:27:58,952 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-02-21 21:27:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:27:59,220 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-02-21 21:27:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 21:27:59,221 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2021-02-21 21:27:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:27:59,222 INFO L225 Difference]: With dead ends: 72 [2021-02-21 21:27:59,222 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 21:27:59,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-02-21 21:27:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 21:27:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 21:27:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 21:27:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 21:27:59,225 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2021-02-21 21:27:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:27:59,225 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 21:27:59,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-21 21:27:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 21:27:59,225 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 21:27:59,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 21:27:59,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 21:27:59,379 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2021-02-21 21:28:00,069 WARN L202 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-02-21 21:28:00,382 WARN L202 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2021-02-21 21:28:00,691 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-02-21 21:28:00,917 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2021-02-21 21:28:01,238 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-02-21 21:28:01,616 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-02-21 21:28:02,038 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-02-21 21:28:02,164 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 19 [2021-02-21 21:28:02,513 WARN L202 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-02-21 21:28:02,623 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 15 [2021-02-21 21:28:02,947 WARN L202 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-02-21 21:28:03,178 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2021-02-21 21:28:03,197 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-21 21:28:03,198 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-21 21:28:03,198 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-21 21:28:03,198 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-21 21:28:03,198 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-21 21:28:03,199 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:28:03,199 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 21:28:03,199 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-21 21:28:03,199 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-21 21:28:03,199 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-21 21:28:03,199 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-21 21:28:03,199 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)|)) [2021-02-21 21:28:03,199 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-21 21:28:03,199 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:28:03,200 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 21:28:03,200 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 21:28:03,200 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 21:28:03,200 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 21:28:03,200 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-21 21:28:03,200 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-21 21:28:03,200 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-21 21:28:03,200 INFO L189 CegarLoopUtils]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2021-02-21 21:28:03,200 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-21 21:28:03,201 INFO L185 CegarLoopUtils]: At program point L35-3(line 35) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~b~0 0) (= main_~a~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2021-02-21 21:28:03,201 INFO L185 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (and (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) [2021-02-21 21:28:03,201 INFO L185 CegarLoopUtils]: At program point L35-4(lines 24 49) the Hoare annotation is: (or (= main_~flag~0 0) (let ((.cse1 (* 4294967296 (div main_~b~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= main_~a~0 main_~b~0) (<= (+ .cse1 main_~a~0) .cse0)))) [2021-02-21 21:28:03,202 INFO L192 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-02-21 21:28:03,202 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 24 49) the Hoare annotation is: true [2021-02-21 21:28:03,202 INFO L185 CegarLoopUtils]: At program point L40(line 40) the Hoare annotation is: (let ((.cse1 (+ main_~j~0 main_~b~0 1)) (.cse0 (+ main_~i~0 main_~a~0))) (let ((.cse5 (* 2 main_~i~0)) (.cse4 (<= .cse1 .cse0))) (or (let ((.cse3 (+ (* 2 main_~j~0) main_~b~0 2)) (.cse2 (+ .cse5 main_~a~0))) (and (<= .cse0 .cse1) (<= .cse2 .cse3) (<= 4 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2))) .cse4 (<= .cse3 .cse2))) (and (<= (+ .cse5 main_~j~0 main_~a~0) (+ main_~b~0 5)) (<= (+ main_~j~0 main_~a~0) (+ main_~b~0 1)) .cse4 (= main_~j~0 1)) (= main_~flag~0 0)))) [2021-02-21 21:28:03,202 INFO L185 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~b~0 0) (= main_~a~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2021-02-21 21:28:03,202 INFO L185 CegarLoopUtils]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse7 (* 3 main_~i~0))) (let ((.cse6 (+ .cse7 main_~a~0 3)) (.cse5 (+ (* 3 main_~j~0) main_~b~0))) (let ((.cse0 (<= (+ .cse7 |main_#t~post5| 3) .cse5)) (.cse1 (<= (+ main_~i~0 |main_#t~post5| 1) (+ main_~j~0 main_~b~0))) (.cse2 (<= .cse6 .cse5)) (.cse3 (<= (+ (* 2 main_~j~0) main_~b~0) (+ (* 2 main_~i~0) |main_#t~post5| 2))) (.cse4 (<= .cse5 .cse6))) (or (and (= main_~i~0 0) (= |main_#t~post5| 0) (= main_~b~0 0) (= main_~a~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 .cse1 (<= 4 main_~i~0) .cse2 .cse3 .cse4 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3 .cse4))))) [2021-02-21 21:28:03,203 INFO L185 CegarLoopUtils]: At program point L36-2(line 36) the Hoare annotation is: (let ((.cse6 (* 2 main_~i~0))) (let ((.cse7 (+ .cse6 main_~a~0 1)) (.cse5 (+ (* 2 main_~j~0) main_~b~0))) (let ((.cse0 (<= (+ (* 3 main_~i~0) |main_#t~post5| 3) (+ (* 3 main_~j~0) main_~b~0))) (.cse1 (<= (+ main_~i~0 |main_#t~post5| 1) (+ main_~j~0 main_~b~0))) (.cse2 (<= .cse7 .cse5)) (.cse3 (<= .cse5 .cse7)) (.cse4 (<= .cse5 (+ .cse6 |main_#t~post5| 2)))) (or (= main_~flag~0 0) (and (<= main_~a~0 1) (= main_~i~0 0) (= |main_#t~post5| 0) (= main_~b~0 0) (<= 1 main_~a~0) (= main_~j~0 1)) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 .cse3 (<= main_~i~0 2) .cse4) (and .cse0 .cse1 .cse2 .cse3 (<= 4 main_~i~0) .cse4 (<= main_~i~0 (* 2 (div main_~i~0 2)))))))) [2021-02-21 21:28:03,203 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (= main_~a~0 0) [2021-02-21 21:28:03,203 INFO L192 CegarLoopUtils]: At program point L45(lines 45 47) the Hoare annotation is: true [2021-02-21 21:28:03,203 INFO L185 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse5 (+ (* 2 main_~i~0) main_~a~0 1)) (.cse4 (+ (* 2 main_~j~0) main_~b~0)) (.cse7 (+ main_~i~0 main_~a~0)) (.cse6 (+ main_~j~0 main_~b~0))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse6 .cse7)) (.cse2 (<= .cse5 .cse4)) (.cse3 (<= .cse4 .cse5))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 4 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 .cse3 (<= main_~i~0 2)) (= main_~flag~0 0) (and (<= main_~a~0 1) (= main_~i~0 0) (= main_~b~0 0) (<= 1 main_~a~0) (= main_~j~0 1))))) [2021-02-21 21:28:03,203 INFO L185 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: (= main_~flag~0 0) [2021-02-21 21:28:03,203 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (= main_~a~0 0) (= main_~b~0 0)) [2021-02-21 21:28:03,204 INFO L192 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-02-21 21:28:03,204 INFO L192 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: true [2021-02-21 21:28:03,204 INFO L192 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: true [2021-02-21 21:28:03,204 INFO L185 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: (let ((.cse1 (* 4294967296 (div main_~b~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= main_~a~0 main_~b~0) (<= (+ .cse1 main_~a~0) .cse0))) [2021-02-21 21:28:03,204 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 24 49) the Hoare annotation is: true [2021-02-21 21:28:03,205 INFO L185 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (= main_~flag~0 0) [2021-02-21 21:28:03,205 INFO L185 CegarLoopUtils]: At program point L42-1(line 42) the Hoare annotation is: (= main_~flag~0 0) [2021-02-21 21:28:03,205 INFO L185 CegarLoopUtils]: At program point L42-2(line 42) the Hoare annotation is: (= main_~flag~0 0) [2021-02-21 21:28:03,205 INFO L185 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (let ((.cse7 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse6 (+ (* 3 main_~j~0) main_~b~0)) (.cse9 (+ main_~j~0 main_~b~0)) (.cse8 (+ main_~i~0 main_~a~0 1))) (let ((.cse2 (<= .cse9 .cse8)) (.cse3 (<= .cse7 .cse6)) (.cse4 (<= .cse8 .cse9)) (.cse5 (<= .cse6 .cse7))) (or (= main_~flag~0 0) (let ((.cse1 (+ main_~i~0 main_~b~0 1)) (.cse0 (+ main_~j~0 main_~a~0))) (and (= main_~i~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (= main_~j~0 1))) (and .cse2 (<= 4 main_~i~0) .cse3 .cse4 .cse5 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse2 .cse3 .cse4 (<= main_~i~0 2) .cse5)))) [2021-02-21 21:28:03,205 INFO L185 CegarLoopUtils]: At program point L30(lines 30 34) the Hoare annotation is: (and (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) [2021-02-21 21:28:03,205 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 49) the Hoare annotation is: true [2021-02-21 21:28:03,206 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-02-21 21:28:03,206 INFO L192 CegarLoopUtils]: At program point L26-1(line 26) the Hoare annotation is: true [2021-02-21 21:28:03,206 INFO L192 CegarLoopUtils]: At program point L26-2(line 26) the Hoare annotation is: true [2021-02-21 21:28:03,206 INFO L185 CegarLoopUtils]: At program point L39(lines 39 43) the Hoare annotation is: (let ((.cse1 (+ main_~j~0 main_~b~0 1)) (.cse0 (+ main_~i~0 main_~a~0))) (let ((.cse5 (* 2 main_~i~0)) (.cse4 (<= .cse1 .cse0))) (or (let ((.cse3 (+ (* 2 main_~j~0) main_~b~0 2)) (.cse2 (+ .cse5 main_~a~0))) (and (<= .cse0 .cse1) (<= .cse2 .cse3) (<= 4 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2))) .cse4 (<= .cse3 .cse2))) (and (<= (+ .cse5 main_~j~0 main_~a~0) (+ main_~b~0 5)) (<= (+ main_~j~0 main_~a~0) (+ main_~b~0 1)) .cse4 (= main_~j~0 1)) (= main_~flag~0 0)))) [2021-02-21 21:28:03,206 INFO L185 CegarLoopUtils]: At program point L39-2(lines 24 49) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2021-02-21 21:28:03,207 INFO L185 CegarLoopUtils]: At program point L35(lines 35 44) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2021-02-21 21:28:03,207 INFO L185 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (or (= main_~flag~0 0) (let ((.cse1 (* 4294967296 (div main_~b~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= main_~a~0 main_~b~0) (<= (+ .cse1 main_~a~0) .cse0)))) [2021-02-21 21:28:03,207 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-02-21 21:28:03,207 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-21 21:28:03,207 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2021-02-21 21:28:03,207 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:28:03,208 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:28:03,208 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))) [2021-02-21 21:28:03,208 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-21 21:28:03,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:28:03 BoogieIcfgContainer [2021-02-21 21:28:03,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:28:03,230 INFO L168 Benchmark]: Toolchain (without parser) took 42192.54 ms. Allocated memory was 153.1 MB in the beginning and 190.8 MB in the end (delta: 37.7 MB). Free memory was 130.3 MB in the beginning and 126.4 MB in the end (delta: 4.0 MB). Peak memory consumption was 108.5 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:03,231 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 153.1 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:28:03,232 INFO L168 Benchmark]: CACSL2BoogieTranslator took 450.05 ms. Allocated memory is still 153.1 MB. Free memory was 129.1 MB in the beginning and 119.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:03,232 INFO L168 Benchmark]: Boogie Preprocessor took 82.22 ms. Allocated memory is still 153.1 MB. Free memory was 119.4 MB in the beginning and 117.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:03,232 INFO L168 Benchmark]: RCFGBuilder took 1273.77 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 134.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:03,232 INFO L168 Benchmark]: TraceAbstraction took 40360.66 ms. Allocated memory was 153.1 MB in the beginning and 190.8 MB in the end (delta: 37.7 MB). Free memory was 133.9 MB in the beginning and 126.4 MB in the end (delta: 7.5 MB). Peak memory consumption was 111.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:28:03,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 153.1 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 450.05 ms. Allocated memory is still 153.1 MB. Free memory was 129.1 MB in the beginning and 119.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 82.22 ms. Allocated memory is still 153.1 MB. Free memory was 119.4 MB in the beginning and 117.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1273.77 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 134.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 40360.66 ms. Allocated memory was 153.1 MB in the beginning and 190.8 MB in the end (delta: 37.7 MB). Free memory was 133.9 MB in the beginning and 126.4 MB in the end (delta: 7.5 MB). Peak memory consumption was 111.8 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 - 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: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 62 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36.2s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 9.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 331 SDtfs, 579 SDslu, 716 SDs, 0 SdLazy, 1755 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 182 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 17 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 52 LocationsWithAnnotation, 108 PreInvPairs, 190 NumberOfFragments, 1393 HoareAnnotationTreeSize, 108 FomulaSimplifications, 6557 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 52 FomulaSimplificationsInter, 2528 FormulaSimplificationTreeSizeReductionInter, 3.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...