/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:49:13,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:49:13,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:49:14,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:49:14,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:49:14,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:49:14,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:49:14,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:49:14,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:49:14,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:49:14,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:49:14,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:49:14,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:49:14,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:49:14,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:49:14,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:49:14,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:49:14,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:49:14,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:49:14,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:49:14,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:49:14,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:49:14,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:49:14,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:49:14,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:49:14,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:49:14,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:49:14,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:49:14,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:49:14,111 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:49:14,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:49:14,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:49:14,116 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:49:14,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:49:14,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:49:14,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:49:14,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:49:14,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:49:14,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:49:14,119 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:49:14,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:49:14,120 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:49:14,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:49:14,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:49:14,122 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:49:14,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:49:14,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:49:14,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:49:14,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:49:14,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:49:14,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:49:14,124 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:49:14,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:49:14,720 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:49:14,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:49:14,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:49:14,728 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:49:14,729 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-09-04 17:49:14,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a21e65d1/c191668a0151413fa101ed2206eb3cbc/FLAGe458d5d1a [2020-09-04 17:49:15,478 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:49:15,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-09-04 17:49:15,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a21e65d1/c191668a0151413fa101ed2206eb3cbc/FLAGe458d5d1a [2020-09-04 17:49:15,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a21e65d1/c191668a0151413fa101ed2206eb3cbc [2020-09-04 17:49:15,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:49:15,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:49:15,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:49:15,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:49:15,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:49:15,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:49:15" (1/1) ... [2020-09-04 17:49:15,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@deb9456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:15, skipping insertion in model container [2020-09-04 17:49:15,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:49:15" (1/1) ... [2020-09-04 17:49:15,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:49:15,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:49:16,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:49:16,278 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:49:16,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:49:16,324 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:49:16,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16 WrapperNode [2020-09-04 17:49:16,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:49:16,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:49:16,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:49:16,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:49:16,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16" (1/1) ... [2020-09-04 17:49:16,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16" (1/1) ... [2020-09-04 17:49:16,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16" (1/1) ... [2020-09-04 17:49:16,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16" (1/1) ... [2020-09-04 17:49:16,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16" (1/1) ... [2020-09-04 17:49:16,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16" (1/1) ... [2020-09-04 17:49:16,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16" (1/1) ... [2020-09-04 17:49:16,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:49:16,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:49:16,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:49:16,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:49:16,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:49:16,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:49:16,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:49:16,551 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:49:16,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:49:16,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:49:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:49:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:49:16,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:49:16,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:49:16,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:49:16,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:49:16,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:49:16,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:49:16,828 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:49:16,828 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 17:49:16,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:49:16 BoogieIcfgContainer [2020-09-04 17:49:16,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:49:16,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:49:16,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:49:16,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:49:16,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:49:15" (1/3) ... [2020-09-04 17:49:16,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253e34a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:49:16, skipping insertion in model container [2020-09-04 17:49:16,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:49:16" (2/3) ... [2020-09-04 17:49:16,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@253e34a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:49:16, skipping insertion in model container [2020-09-04 17:49:16,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:49:16" (3/3) ... [2020-09-04 17:49:16,849 INFO L109 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-09-04 17:49:16,867 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:49:16,884 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:49:16,942 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:49:17,022 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:49:17,022 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:49:17,022 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:49:17,022 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:49:17,022 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:49:17,023 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:49:17,026 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:49:17,026 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:49:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-04 17:49:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 17:49:17,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:17,074 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] [2020-09-04 17:49:17,074 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash 317967837, now seen corresponding path program 1 times [2020-09-04 17:49:17,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:17,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386485564] [2020-09-04 17:49:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:17,172 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:17,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:17,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386485564] [2020-09-04 17:49:17,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:17,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:49:17,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527903149] [2020-09-04 17:49:17,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:49:17,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:17,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:49:17,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:49:17,650 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 9 states. [2020-09-04 17:49:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:17,968 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-09-04 17:49:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 17:49:17,971 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-09-04 17:49:17,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:17,984 INFO L225 Difference]: With dead ends: 70 [2020-09-04 17:49:17,985 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 17:49:17,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-04 17:49:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 17:49:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-09-04 17:49:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-04 17:49:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-09-04 17:49:18,059 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-09-04 17:49:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:18,060 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-09-04 17:49:18,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:49:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-09-04 17:49:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 17:49:18,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:18,062 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] [2020-09-04 17:49:18,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:49:18,063 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash -628039010, now seen corresponding path program 1 times [2020-09-04 17:49:18,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:18,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973032080] [2020-09-04 17:49:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:18,097 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:18,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:18,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973032080] [2020-09-04 17:49:18,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:18,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 17:49:18,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006302370] [2020-09-04 17:49:18,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 17:49:18,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:18,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 17:49:18,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:49:18,506 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-09-04 17:49:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:18,887 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-09-04 17:49:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 17:49:18,888 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-09-04 17:49:18,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:18,890 INFO L225 Difference]: With dead ends: 53 [2020-09-04 17:49:18,890 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 17:49:18,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-04 17:49:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 17:49:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-09-04 17:49:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 17:49:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-09-04 17:49:18,905 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2020-09-04 17:49:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:18,906 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-09-04 17:49:18,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 17:49:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-09-04 17:49:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 17:49:18,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:18,908 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] [2020-09-04 17:49:18,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:49:18,909 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:18,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:18,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1791276066, now seen corresponding path program 1 times [2020-09-04 17:49:18,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:18,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899330722] [2020-09-04 17:49:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:21,214 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-09-04 17:49:21,279 INFO L273 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-09-04 17:49:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:21,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:21,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899330722] [2020-09-04 17:49:21,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:21,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 17:49:21,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9269937] [2020-09-04 17:49:21,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 17:49:21,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 17:49:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-04 17:49:21,961 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 14 states. [2020-09-04 17:49:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:22,534 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-09-04 17:49:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 17:49:22,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-09-04 17:49:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:22,538 INFO L225 Difference]: With dead ends: 56 [2020-09-04 17:49:22,538 INFO L226 Difference]: Without dead ends: 51 [2020-09-04 17:49:22,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-09-04 17:49:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-04 17:49:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-09-04 17:49:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 17:49:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-09-04 17:49:22,569 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 27 [2020-09-04 17:49:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:22,570 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-09-04 17:49:22,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 17:49:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-09-04 17:49:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 17:49:22,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:22,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:22,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:49:22,573 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:22,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:22,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1600642371, now seen corresponding path program 2 times [2020-09-04 17:49:22,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:22,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439241962] [2020-09-04 17:49:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:22,585 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:22,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:22,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439241962] [2020-09-04 17:49:22,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:22,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 17:49:22,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805540535] [2020-09-04 17:49:22,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 17:49:22,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:22,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 17:49:22,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:49:22,949 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 14 states. [2020-09-04 17:49:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:23,547 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-09-04 17:49:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 17:49:23,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-09-04 17:49:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:23,549 INFO L225 Difference]: With dead ends: 64 [2020-09-04 17:49:23,549 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 17:49:23,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:49:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 17:49:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-09-04 17:49:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 17:49:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-04 17:49:23,559 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-04 17:49:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:23,559 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-04 17:49:23,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 17:49:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-04 17:49:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 17:49:23,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:23,561 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:23,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:49:23,562 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:23,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:23,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1531087869, now seen corresponding path program 1 times [2020-09-04 17:49:23,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:23,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892813902] [2020-09-04 17:49:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:23,569 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:23,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:23,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892813902] [2020-09-04 17:49:23,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:23,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 17:49:23,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191380990] [2020-09-04 17:49:23,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 17:49:23,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:23,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 17:49:23,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:49:23,895 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 14 states. [2020-09-04 17:49:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:24,485 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-09-04 17:49:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 17:49:24,487 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-09-04 17:49:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:24,491 INFO L225 Difference]: With dead ends: 76 [2020-09-04 17:49:24,491 INFO L226 Difference]: Without dead ends: 71 [2020-09-04 17:49:24,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:49:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-04 17:49:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2020-09-04 17:49:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-04 17:49:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-09-04 17:49:24,515 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2020-09-04 17:49:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:24,519 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-09-04 17:49:24,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 17:49:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-09-04 17:49:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 17:49:24,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:24,522 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:24,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:49:24,522 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash -966733443, now seen corresponding path program 2 times [2020-09-04 17:49:24,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:24,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511769841] [2020-09-04 17:49:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:24,529 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:24,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:24,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511769841] [2020-09-04 17:49:24,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:24,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 17:49:24,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384376773] [2020-09-04 17:49:24,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 17:49:24,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:24,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 17:49:24,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:49:24,855 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 14 states. [2020-09-04 17:49:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:25,483 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-09-04 17:49:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 17:49:25,484 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-09-04 17:49:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:25,486 INFO L225 Difference]: With dead ends: 83 [2020-09-04 17:49:25,486 INFO L226 Difference]: Without dead ends: 78 [2020-09-04 17:49:25,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-09-04 17:49:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-04 17:49:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2020-09-04 17:49:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 17:49:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-09-04 17:49:25,501 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 34 [2020-09-04 17:49:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:25,501 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-09-04 17:49:25,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 17:49:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-09-04 17:49:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 17:49:25,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:25,504 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:25,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:49:25,504 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1509294206, now seen corresponding path program 3 times [2020-09-04 17:49:25,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:25,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247822394] [2020-09-04 17:49:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:25,521 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:25,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:25,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247822394] [2020-09-04 17:49:25,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:25,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 17:49:25,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820014254] [2020-09-04 17:49:25,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 17:49:25,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:25,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 17:49:25,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:49:25,914 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 15 states. [2020-09-04 17:49:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:26,527 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-09-04 17:49:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 17:49:26,528 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-04 17:49:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:26,529 INFO L225 Difference]: With dead ends: 63 [2020-09-04 17:49:26,529 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 17:49:26,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-09-04 17:49:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 17:49:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 17:49:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 17:49:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 17:49:26,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-09-04 17:49:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:26,532 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 17:49:26,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 17:49:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 17:49:26,532 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 17:49:26,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:49:26,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 17:49:27,189 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:49:27,190 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:49:27,190 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:49:27,190 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 17:49:27,190 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 17:49:27,190 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:49:27,191 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:49:27,191 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:49:27,191 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 17:49:27,191 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-04 17:49:27,191 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:49:27,191 INFO L271 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-09-04 17:49:27,192 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 29) the Hoare annotation is: true [2020-09-04 17:49:27,192 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse1 (+ (* 3 main_~i~0) 2)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 (* 3 main_~n~0)))) [2020-09-04 17:49:27,192 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-09-04 17:49:27,192 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-09-04 17:49:27,192 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 26) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-09-04 17:49:27,193 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~i~0)) [2020-09-04 17:49:27,193 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 26) the Hoare annotation is: (let ((.cse1 (* 3 main_~n~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-09-04 17:49:27,193 INFO L264 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (<= main_~a~0 0) (<= 0 main_~i~0) (<= (* 3 main_~i~0) main_~a~0)) [2020-09-04 17:49:27,193 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 29) the Hoare annotation is: true [2020-09-04 17:49:27,193 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-09-04 17:49:27,194 INFO L264 CegarLoopResult]: At program point L15-4(line 15) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-09-04 17:49:27,194 INFO L264 CegarLoopResult]: At program point L15-5(line 15) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-09-04 17:49:27,194 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 29) the Hoare annotation is: true [2020-09-04 17:49:27,194 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-09-04 17:49:27,195 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (+ (* 3 main_~i~0) 1))) (and (<= .cse0 .cse1) (<= (+ main_~a~0 main_~b~0 2) (* 3 main_~n~0)) (<= .cse1 .cse0))) [2020-09-04 17:49:27,195 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-09-04 17:49:27,195 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 24) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-09-04 17:49:27,195 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= 0 main_~i~0) (<= .cse0 main_~a~0) (<= main_~a~0 .cse0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-09-04 17:49:27,196 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-09-04 17:49:27,196 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= main_~a~0 0) (<= .cse0 main_~a~0) (<= .cse1 0) (<= .cse0 .cse1))) [2020-09-04 17:49:27,196 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-09-04 17:49:27,196 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-09-04 17:49:27,196 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-09-04 17:49:27,196 INFO L264 CegarLoopResult]: At program point L18-5(lines 18 24) the Hoare annotation is: (let ((.cse0 (+ (* 3 main_~i~0) 3)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 3 main_~n~0)))) [2020-09-04 17:49:27,197 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-09-04 17:49:27,197 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 17:49:27,197 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:49:27,197 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:49:27,197 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:49:27,198 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:49:27,198 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:49:27,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:49:27 BoogieIcfgContainer [2020-09-04 17:49:27,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:49:27,232 INFO L168 Benchmark]: Toolchain (without parser) took 11370.70 ms. Allocated memory was 141.0 MB in the beginning and 288.4 MB in the end (delta: 147.3 MB). Free memory was 105.8 MB in the beginning and 235.5 MB in the end (delta: -129.7 MB). Peak memory consumption was 135.6 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:27,234 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 141.0 MB. Free memory was 123.6 MB in the beginning and 123.2 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-04 17:49:27,235 INFO L168 Benchmark]: CACSL2BoogieTranslator took 462.37 ms. Allocated memory is still 141.0 MB. Free memory was 105.4 MB in the beginning and 96.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:27,236 INFO L168 Benchmark]: Boogie Preprocessor took 49.36 ms. Allocated memory is still 141.0 MB. Free memory was 96.0 MB in the beginning and 94.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:27,237 INFO L168 Benchmark]: RCFGBuilder took 459.09 ms. Allocated memory was 141.0 MB in the beginning and 201.9 MB in the end (delta: 60.8 MB). Free memory was 94.3 MB in the beginning and 167.4 MB in the end (delta: -73.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:27,238 INFO L168 Benchmark]: TraceAbstraction took 10392.53 ms. Allocated memory was 201.9 MB in the beginning and 288.4 MB in the end (delta: 86.5 MB). Free memory was 166.5 MB in the beginning and 235.5 MB in the end (delta: -69.0 MB). Peak memory consumption was 135.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:49:27,242 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 141.0 MB. Free memory was 123.6 MB in the beginning and 123.2 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 462.37 ms. Allocated memory is still 141.0 MB. Free memory was 105.4 MB in the beginning and 96.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.36 ms. Allocated memory is still 141.0 MB. Free memory was 96.0 MB in the beginning and 94.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 459.09 ms. Allocated memory was 141.0 MB in the beginning and 201.9 MB in the end (delta: 60.8 MB). Free memory was 94.3 MB in the beginning and 167.4 MB in the end (delta: -73.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10392.53 ms. Allocated memory was 201.9 MB in the beginning and 288.4 MB in the end (delta: 86.5 MB). Free memory was 166.5 MB in the beginning and 235.5 MB in the end (delta: -69.0 MB). Peak memory consumption was 135.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.5s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 333 SDslu, 1070 SDs, 0 SdLazy, 929 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred 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: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 79 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 80 PreInvPairs, 138 NumberOfFragments, 443 HoareAnnotationTreeSize, 80 FomulaSimplifications, 12640 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 38 FomulaSimplificationsInter, 181 FormulaSimplificationTreeSizeReductionInter, 0.3s 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...