/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-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:01:05,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:01:05,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:01:05,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:01:05,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:01:05,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:01:05,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:01:05,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:01:05,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:01:05,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:01:05,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:01:05,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:01:05,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:01:05,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:01:05,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:01:05,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:01:05,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:01:05,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:01:05,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:01:05,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:01:05,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:01:05,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:01:05,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:01:05,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:01:05,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:01:05,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:01:05,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:01:05,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:01:05,588 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 14:01:05,597 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:01:05,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:01:05,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:01:05,599 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:01:05,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:01:05,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:01:05,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:01:05,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:01:05,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:01:05,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:01:05,600 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:01:05,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:01:05,601 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:01:05,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:01:05,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:01:05,601 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:01:05,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:01:05,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:01:05,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:01:05,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:01:05,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:01:05,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:01:05,603 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:01:05,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:01:05,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:01:05,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:01:05,910 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:01:05,910 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:01:05,911 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-07-07 14:01:05,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723f56ed9/6cedc77d2edb463eacdafc71eb81ad2e/FLAG49220f9ac [2020-07-07 14:01:06,475 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:01:06,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/large_const.i [2020-07-07 14:01:06,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723f56ed9/6cedc77d2edb463eacdafc71eb81ad2e/FLAG49220f9ac [2020-07-07 14:01:06,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723f56ed9/6cedc77d2edb463eacdafc71eb81ad2e [2020-07-07 14:01:06,844 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:01:06,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:01:06,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:06,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:01:06,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:01:06,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:06" (1/1) ... [2020-07-07 14:01:06,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62444b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:06, skipping insertion in model container [2020-07-07 14:01:06,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:06" (1/1) ... [2020-07-07 14:01:06,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:01:06,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:01:07,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:07,129 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:01:07,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:07,180 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:01:07,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07 WrapperNode [2020-07-07 14:01:07,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:07,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:01:07,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:01:07,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:01:07,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:01:07,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:01:07,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:01:07,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:01:07,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (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 14:01:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:01:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:01:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:01:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:01:07,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:01:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:01:07,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:01:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:01:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:01:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:01:07,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:01:07,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:01:07,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:01:07,772 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:01:07,773 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 14:01:07,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:07 BoogieIcfgContainer [2020-07-07 14:01:07,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:01:07,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:01:07,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:01:07,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:01:07,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:01:06" (1/3) ... [2020-07-07 14:01:07,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52891509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:07, skipping insertion in model container [2020-07-07 14:01:07,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (2/3) ... [2020-07-07 14:01:07,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52891509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:07, skipping insertion in model container [2020-07-07 14:01:07,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:07" (3/3) ... [2020-07-07 14:01:07,788 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-07-07 14:01:07,799 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:01:07,807 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:01:07,820 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:01:07,845 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:01:07,845 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:01:07,845 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:01:07,845 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:01:07,845 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:01:07,846 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:01:07,846 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:01:07,846 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:01:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-07-07 14:01:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 14:01:07,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:07,878 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 14:01:07,879 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash 288343897, now seen corresponding path program 1 times [2020-07-07 14:01:07,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:07,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934283608] [2020-07-07 14:01:07,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,057 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 14:01:08,057 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:08,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934283608] [2020-07-07 14:01:08,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:08,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 14:01:08,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751613239] [2020-07-07 14:01:08,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 14:01:08,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 14:01:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:01:08,083 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 2 states. [2020-07-07 14:01:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:08,113 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-07-07 14:01:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 14:01:08,114 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-07-07 14:01:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:08,124 INFO L225 Difference]: With dead ends: 75 [2020-07-07 14:01:08,124 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 14:01:08,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:01:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 14:01:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-07 14:01:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 14:01:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-07-07 14:01:08,178 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 27 [2020-07-07 14:01:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:08,179 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-07-07 14:01:08,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 14:01:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-07-07 14:01:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 14:01:08,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:08,181 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 14:01:08,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:01:08,182 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash 320540924, now seen corresponding path program 1 times [2020-07-07 14:01:08,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:08,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546275747] [2020-07-07 14:01:08,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,287 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 14:01:08,287 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:08,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546275747] [2020-07-07 14:01:08,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:08,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:01:08,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114760295] [2020-07-07 14:01:08,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:01:08,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:08,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:01:08,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:01:08,291 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2020-07-07 14:01:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:08,388 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-07-07 14:01:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 14:01:08,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-07 14:01:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:08,390 INFO L225 Difference]: With dead ends: 67 [2020-07-07 14:01:08,391 INFO L226 Difference]: Without dead ends: 51 [2020-07-07 14:01:08,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:01:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-07 14:01:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-07-07 14:01:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-07 14:01:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-07-07 14:01:08,405 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2020-07-07 14:01:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:08,406 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-07-07 14:01:08,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:01:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-07-07 14:01:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 14:01:08,407 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:08,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:08,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:01:08,408 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:08,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:08,409 INFO L82 PathProgramCache]: Analyzing trace with hash 751787059, now seen corresponding path program 1 times [2020-07-07 14:01:08,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:08,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95859540] [2020-07-07 14:01:08,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,589 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 14:01:08,590 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:08,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95859540] [2020-07-07 14:01:08,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:08,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:01:08,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085290211] [2020-07-07 14:01:08,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:01:08,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:08,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:01:08,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:01:08,595 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 7 states. [2020-07-07 14:01:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:08,787 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-07-07 14:01:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 14:01:08,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-07-07 14:01:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:08,790 INFO L225 Difference]: With dead ends: 88 [2020-07-07 14:01:08,790 INFO L226 Difference]: Without dead ends: 86 [2020-07-07 14:01:08,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:01:08,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-07 14:01:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-07-07 14:01:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 14:01:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-07-07 14:01:08,811 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 37 [2020-07-07 14:01:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:08,812 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-07-07 14:01:08,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:01:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-07-07 14:01:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 14:01:08,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:08,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:08,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:01:08,815 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:08,815 INFO L82 PathProgramCache]: Analyzing trace with hash 3796503, now seen corresponding path program 1 times [2020-07-07 14:01:08,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:08,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020246509] [2020-07-07 14:01:08,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,916 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 14:01:08,916 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:08,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020246509] [2020-07-07 14:01:08,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:08,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:01:08,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164358725] [2020-07-07 14:01:08,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:01:08,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:01:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:01:08,920 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 7 states. [2020-07-07 14:01:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:09,084 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2020-07-07 14:01:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 14:01:09,085 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-07 14:01:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:09,089 INFO L225 Difference]: With dead ends: 105 [2020-07-07 14:01:09,089 INFO L226 Difference]: Without dead ends: 103 [2020-07-07 14:01:09,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:01:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-07 14:01:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2020-07-07 14:01:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-07 14:01:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-07-07 14:01:09,110 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 38 [2020-07-07 14:01:09,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:09,111 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-07-07 14:01:09,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:01:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-07-07 14:01:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 14:01:09,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:09,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:09,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:01:09,113 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:09,114 INFO L82 PathProgramCache]: Analyzing trace with hash 197728887, now seen corresponding path program 1 times [2020-07-07 14:01:09,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:09,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326981691] [2020-07-07 14:01:09,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:09,215 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 14:01:09,215 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:09,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326981691] [2020-07-07 14:01:09,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:09,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:01:09,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515023519] [2020-07-07 14:01:09,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:01:09,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:09,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:01:09,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:01:09,219 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 7 states. [2020-07-07 14:01:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:09,339 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-07-07 14:01:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 14:01:09,340 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-07 14:01:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:09,341 INFO L225 Difference]: With dead ends: 116 [2020-07-07 14:01:09,342 INFO L226 Difference]: Without dead ends: 114 [2020-07-07 14:01:09,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:01:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-07 14:01:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2020-07-07 14:01:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-07 14:01:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2020-07-07 14:01:09,368 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 38 [2020-07-07 14:01:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:09,369 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2020-07-07 14:01:09,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:01:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2020-07-07 14:01:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 14:01:09,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:09,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:09,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:01:09,376 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:09,377 INFO L82 PathProgramCache]: Analyzing trace with hash 88652198, now seen corresponding path program 1 times [2020-07-07 14:01:09,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:09,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255144854] [2020-07-07 14:01:09,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:09,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:01:09,388 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 14:01:09,393 INFO L168 Benchmark]: Toolchain (without parser) took 2546.70 ms. Allocated memory was 135.3 MB in the beginning and 226.5 MB in the end (delta: 91.2 MB). Free memory was 100.7 MB in the beginning and 153.0 MB in the end (delta: -52.4 MB). Peak memory consumption was 38.9 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,395 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 135.3 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.88 ms. Allocated memory is still 135.3 MB. Free memory was 100.5 MB in the beginning and 90.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,399 INFO L168 Benchmark]: Boogie Preprocessor took 138.18 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 90.6 MB in the beginning and 178.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,400 INFO L168 Benchmark]: RCFGBuilder took 457.28 ms. Allocated memory is still 199.8 MB. Free memory was 178.9 MB in the beginning and 161.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,401 INFO L168 Benchmark]: TraceAbstraction took 1611.62 ms. Allocated memory was 199.8 MB in the beginning and 226.5 MB in the end (delta: 26.7 MB). Free memory was 160.6 MB in the beginning and 153.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,409 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 135.3 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.88 ms. Allocated memory is still 135.3 MB. Free memory was 100.5 MB in the beginning and 90.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.18 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 90.6 MB in the beginning and 178.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 457.28 ms. Allocated memory is still 199.8 MB. Free memory was 178.9 MB in the beginning and 161.3 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1611.62 ms. Allocated memory was 199.8 MB in the beginning and 226.5 MB in the end (delta: 26.7 MB). Free memory was 160.6 MB in the beginning and 153.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...