/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 0.1.25-86f66a4 [2020-07-07 14:01:19,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:01:19,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:01:19,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:01:19,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:01:19,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:01:19,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:01:19,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:01:19,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:01:19,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:01:19,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:01:19,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:01:19,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:01:19,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:01:19,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:01:19,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:01:19,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:01:19,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:01:19,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:01:19,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:01:19,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:01:19,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:01:19,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:01:19,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:01:19,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:01:19,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:01:19,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:01:19,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:01:19,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:01:19,690 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:01:19,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:01:19,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:01:19,693 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:01:19,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:01:19,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:01:19,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:01:19,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:01:19,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:01:19,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:01:19,696 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:01:19,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:01:19,696 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:01:19,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:01:19,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:01:19,697 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:01:19,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:01:19,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:01:19,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:01:19,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:01:19,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:01:19,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:01:19,699 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:01:19,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:01:19,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:01:19,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:01:19,982 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:01:19,982 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:01:19,983 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-07-07 14:01:20,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/720ce65ca/9246eeaa9c7b4070935a8841baf4e677/FLAG2ecb60b33 [2020-07-07 14:01:20,595 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:01:20,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-07-07 14:01:20,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/720ce65ca/9246eeaa9c7b4070935a8841baf4e677/FLAG2ecb60b33 [2020-07-07 14:01:20,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/720ce65ca/9246eeaa9c7b4070935a8841baf4e677 [2020-07-07 14:01:20,945 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:01:20,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:01:20,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:20,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:01:20,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:01:20,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:20" (1/1) ... [2020-07-07 14:01:20,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eaa2c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:20, skipping insertion in model container [2020-07-07 14:01:20,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:20" (1/1) ... [2020-07-07 14:01:20,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:01:20,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:01:21,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:21,166 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:01:21,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:21,200 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:01:21,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21 WrapperNode [2020-07-07 14:01:21,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:21,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:01:21,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:01:21,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:01:21,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21" (1/1) ... [2020-07-07 14:01:21,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21" (1/1) ... [2020-07-07 14:01:21,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21" (1/1) ... [2020-07-07 14:01:21,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21" (1/1) ... [2020-07-07 14:01:21,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21" (1/1) ... [2020-07-07 14:01:21,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21" (1/1) ... [2020-07-07 14:01:21,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21" (1/1) ... [2020-07-07 14:01:21,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:01:21,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:01:21,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:01:21,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:01:21,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21" (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 [2020-07-07 14:01:21,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:01:21,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:01:21,386 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:01:21,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:01:21,386 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:01:21,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:01:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:01:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:01:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:01:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:01:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:01:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:01:21,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:01:21,608 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:01:21,608 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 14:01:21,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:21 BoogieIcfgContainer [2020-07-07 14:01:21,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:01:21,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:01:21,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:01:21,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:01:21,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:01:20" (1/3) ... [2020-07-07 14:01:21,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468e67bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:21, skipping insertion in model container [2020-07-07 14:01:21,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:21" (2/3) ... [2020-07-07 14:01:21,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468e67bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:21, skipping insertion in model container [2020-07-07 14:01:21,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:21" (3/3) ... [2020-07-07 14:01:21,622 INFO L109 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-07-07 14:01:21,639 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:01:21,651 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:01:21,672 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:01:21,697 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:01:21,697 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:01:21,698 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:01:21,698 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:01:21,698 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:01:21,698 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:01:21,698 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:01:21,699 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:01:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-07 14:01:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 14:01:21,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:21,728 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] [2020-07-07 14:01:21,729 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:21,736 INFO L82 PathProgramCache]: Analyzing trace with hash 317967837, now seen corresponding path program 1 times [2020-07-07 14:01:21,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:21,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701746474] [2020-07-07 14:01:21,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:22,156 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:22,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701746474] [2020-07-07 14:01:22,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:22,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:01:22,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783360190] [2020-07-07 14:01:22,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:01:22,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:01:22,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:01:22,186 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 10 states. [2020-07-07 14:01:22,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:22,423 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-07-07 14:01:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 14:01:22,425 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-07-07 14:01:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:22,435 INFO L225 Difference]: With dead ends: 70 [2020-07-07 14:01:22,435 INFO L226 Difference]: Without dead ends: 40 [2020-07-07 14:01:22,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:01:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-07 14:01:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-07-07 14:01:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 14:01:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-07-07 14:01:22,490 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-07-07 14:01:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:22,490 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-07-07 14:01:22,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:01:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-07-07 14:01:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 14:01:22,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:22,492 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] [2020-07-07 14:01:22,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:01:22,493 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:22,494 INFO L82 PathProgramCache]: Analyzing trace with hash -628039010, now seen corresponding path program 1 times [2020-07-07 14:01:22,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:22,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034473356] [2020-07-07 14:01:22,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:22,882 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:22,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034473356] [2020-07-07 14:01:22,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:22,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:01:22,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642902316] [2020-07-07 14:01:22,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:01:22,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:22,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:01:22,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:01:22,886 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-07-07 14:01:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:23,209 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-07-07 14:01:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 14:01:23,210 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-07-07 14:01:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:23,212 INFO L225 Difference]: With dead ends: 53 [2020-07-07 14:01:23,212 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 14:01:23,214 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 [2020-07-07 14:01:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 14:01:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-07 14:01:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-07 14:01:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-07-07 14:01:23,225 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2020-07-07 14:01:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:23,225 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-07-07 14:01:23,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:01:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-07-07 14:01:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 14:01:23,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:23,227 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] [2020-07-07 14:01:23,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:01:23,228 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1791276066, now seen corresponding path program 1 times [2020-07-07 14:01:23,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:23,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846337062] [2020-07-07 14:01:23,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Garbage collection #1: 17 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 17 to 31 Garbage collection #2: 31 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 31 to 61 Garbage collection #3: 61 nodes / 0 free / 0.0s / 0.0s total Resizing node table from 61 to 113 [2020-07-07 14:01:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:26,010 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:26,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846337062] [2020-07-07 14:01:26,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:26,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 14:01:26,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507550956] [2020-07-07 14:01:26,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 14:01:26,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 14:01:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:01:26,014 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 14 states. [2020-07-07 14:01:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:26,365 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-07-07 14:01:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 14:01:26,366 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-07-07 14:01:26,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:26,367 INFO L225 Difference]: With dead ends: 56 [2020-07-07 14:01:26,367 INFO L226 Difference]: Without dead ends: 51 [2020-07-07 14:01:26,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-07-07 14:01:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-07 14:01:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-07-07 14:01:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 14:01:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-07-07 14:01:26,379 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 27 [2020-07-07 14:01:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:26,379 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-07-07 14:01:26,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 14:01:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-07-07 14:01:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 14:01:26,381 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:26,381 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] [2020-07-07 14:01:26,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:01:26,382 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:26,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1600642371, now seen corresponding path program 2 times [2020-07-07 14:01:26,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:26,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107345729] [2020-07-07 14:01:26,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:26,687 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:26,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107345729] [2020-07-07 14:01:26,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:26,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 14:01:26,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834476379] [2020-07-07 14:01:26,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 14:01:26,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 14:01:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:01:26,692 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 14 states. [2020-07-07 14:01:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:27,132 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-07-07 14:01:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 14:01:27,135 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-07-07 14:01:27,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:27,136 INFO L225 Difference]: With dead ends: 64 [2020-07-07 14:01:27,137 INFO L226 Difference]: Without dead ends: 59 [2020-07-07 14:01:27,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:01:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-07 14:01:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2020-07-07 14:01:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-07 14:01:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-07 14:01:27,151 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-07-07 14:01:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:27,151 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-07 14:01:27,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 14:01:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-07 14:01:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 14:01:27,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:27,153 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] [2020-07-07 14:01:27,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:01:27,153 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:27,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:27,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1531087869, now seen corresponding path program 1 times [2020-07-07 14:01:27,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:27,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039713099] [2020-07-07 14:01:27,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:27,425 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:27,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039713099] [2020-07-07 14:01:27,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:27,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 14:01:27,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034998751] [2020-07-07 14:01:27,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 14:01:27,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:27,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 14:01:27,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:01:27,430 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 14 states. [2020-07-07 14:01:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:27,953 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-07-07 14:01:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 14:01:27,953 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-07-07 14:01:27,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:27,955 INFO L225 Difference]: With dead ends: 76 [2020-07-07 14:01:27,955 INFO L226 Difference]: Without dead ends: 71 [2020-07-07 14:01:27,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:01:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-07 14:01:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2020-07-07 14:01:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 14:01:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-07-07 14:01:27,967 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2020-07-07 14:01:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:27,967 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-07-07 14:01:27,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 14:01:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-07-07 14:01:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 14:01:27,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:27,969 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] [2020-07-07 14:01:27,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:01:27,969 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:27,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:27,970 INFO L82 PathProgramCache]: Analyzing trace with hash -966733443, now seen corresponding path program 2 times [2020-07-07 14:01:27,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:27,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370895417] [2020-07-07 14:01:27,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:28,236 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:28,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370895417] [2020-07-07 14:01:28,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:28,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 14:01:28,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31235633] [2020-07-07 14:01:28,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 14:01:28,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:28,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 14:01:28,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:01:28,238 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 14 states. [2020-07-07 14:01:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:28,752 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-07-07 14:01:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 14:01:28,752 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-07-07 14:01:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:28,754 INFO L225 Difference]: With dead ends: 83 [2020-07-07 14:01:28,754 INFO L226 Difference]: Without dead ends: 78 [2020-07-07 14:01:28,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:01:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-07 14:01:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2020-07-07 14:01:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-07 14:01:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-07-07 14:01:28,774 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 34 [2020-07-07 14:01:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:28,778 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-07-07 14:01:28,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 14:01:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-07-07 14:01:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 14:01:28,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:28,784 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] [2020-07-07 14:01:28,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:01:28,785 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:28,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1509294206, now seen corresponding path program 3 times [2020-07-07 14:01:28,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:28,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538797662] [2020-07-07 14:01:28,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:29,155 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:29,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538797662] [2020-07-07 14:01:29,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:29,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 14:01:29,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504363517] [2020-07-07 14:01:29,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 14:01:29,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:29,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 14:01:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:01:29,157 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 15 states. [2020-07-07 14:01:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:29,651 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-07-07 14:01:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 14:01:29,652 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-07-07 14:01:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:29,653 INFO L225 Difference]: With dead ends: 63 [2020-07-07 14:01:29,653 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 14:01:29,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-07-07 14:01:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 14:01:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 14:01:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 14:01:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 14:01:29,656 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-07-07 14:01:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:29,656 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 14:01:29,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 14:01:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 14:01:29,657 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 14:01:29,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 14:01:29,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 14:01:30,041 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:01:30,041 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:01:30,041 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:01:30,041 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 14:01:30,041 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 14:01:30,042 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:01:30,042 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:01:30,042 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:01:30,042 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-07 14:01:30,042 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-07-07 14:01:30,042 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:01:30,042 INFO L271 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-07-07 14:01:30,042 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 29) the Hoare annotation is: true [2020-07-07 14:01:30,043 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (+ (* 3 main_~i~0) 2)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 3 main_~n~0)))) [2020-07-07 14:01:30,043 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))) [2020-07-07 14:01:30,043 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-07-07 14:01:30,043 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))) [2020-07-07 14:01:30,043 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~i~0)) [2020-07-07 14:01:30,043 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 26) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~n~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-07-07 14:01:30,043 INFO L264 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= (* 3 main_~i~0) main_~a~0)) [2020-07-07 14:01:30,043 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 29) the Hoare annotation is: true [2020-07-07 14:01:30,044 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 main_~a~0))) [2020-07-07 14:01:30,044 INFO L264 CegarLoopResult]: At program point L15-4(line 15) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 main_~a~0))) [2020-07-07 14:01:30,044 INFO L264 CegarLoopResult]: At program point L15-5(line 15) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 main_~a~0))) [2020-07-07 14:01:30,044 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 29) the Hoare annotation is: true [2020-07-07 14:01:30,044 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))) [2020-07-07 14:01:30,045 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse1 (+ (* 3 main_~i~0) 1)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= (+ main_~a~0 main_~b~0 2) (* 3 main_~n~0)))) [2020-07-07 14:01:30,045 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))) [2020-07-07 14:01:30,045 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))) [2020-07-07 14:01:30,045 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 main_~a~0))) [2020-07-07 14:01:30,045 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))) [2020-07-07 14:01:30,045 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 0) (<= main_~a~0 0) (<= .cse1 .cse0) (<= .cse1 main_~a~0))) [2020-07-07 14:01:30,046 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-07-07 14:01:30,046 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))) [2020-07-07 14:01:30,046 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-07-07 14:01:30,046 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)))) [2020-07-07 14:01:30,046 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-07-07 14:01:30,046 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-07 14:01:30,047 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:01:30,047 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:01:30,047 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:01:30,047 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:01:30,047 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:01:30,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 02:01:30 BoogieIcfgContainer [2020-07-07 14:01:30,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 14:01:30,072 INFO L168 Benchmark]: Toolchain (without parser) took 9124.49 ms. Allocated memory was 142.1 MB in the beginning and 275.3 MB in the end (delta: 133.2 MB). Free memory was 103.0 MB in the beginning and 107.0 MB in the end (delta: -4.0 MB). Peak memory consumption was 129.1 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:30,073 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 142.1 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 14:01:30,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.72 ms. Allocated memory is still 142.1 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:30,074 INFO L168 Benchmark]: Boogie Preprocessor took 33.65 ms. Allocated memory is still 142.1 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:30,075 INFO L168 Benchmark]: RCFGBuilder took 378.00 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 170.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:30,076 INFO L168 Benchmark]: TraceAbstraction took 8454.54 ms. Allocated memory was 204.5 MB in the beginning and 275.3 MB in the end (delta: 70.8 MB). Free memory was 169.5 MB in the beginning and 107.0 MB in the end (delta: 62.5 MB). Peak memory consumption was 133.3 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:30,080 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 142.1 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.72 ms. Allocated memory is still 142.1 MB. Free memory was 102.8 MB in the beginning and 93.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.65 ms. Allocated memory is still 142.1 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 378.00 ms. Allocated memory was 142.1 MB in the beginning and 204.5 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 170.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8454.54 ms. Allocated memory was 204.5 MB in the beginning and 275.3 MB in the end (delta: 70.8 MB). Free memory was 169.5 MB in the beginning and 107.0 MB in the end (delta: 62.5 MB). Peak memory consumption was 133.3 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: 0 == \old(cond) || !(0 == cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.9s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 344 SDslu, 1082 SDs, 0 SdLazy, 926 SolverSat, 79 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 3.3s 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 79 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 80 PreInvPairs, 138 NumberOfFragments, 443 HoareAnnotationTreeSize, 80 FomulaSimplifications, 12758 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 38 FomulaSimplificationsInter, 117 FormulaSimplificationTreeSizeReductionInter, 0.2s 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...