/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/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:24:00,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:24:00,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:24:00,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:24:00,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:24:00,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:24:00,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:24:00,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:24:00,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:24:00,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:24:00,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:24:00,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:24:00,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:24:00,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:24:00,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:24:00,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:24:00,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:24:00,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:24:00,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:24:00,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:24:00,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:24:00,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:24:00,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:24:00,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:24:00,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 13:24:00,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 13:24:00,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 13:24:00,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 13:24:00,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 13:24:00,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 13:24:00,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 13:24:00,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 13:24:00,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 13:24:00,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 13:24:00,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 13:24:00,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 13:24:00,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 13:24:00,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 13:24:00,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:24:00,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:24:00,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:24:00,994 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 13:24:01,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:24:01,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:24:01,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:24:01,005 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:24:01,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:24:01,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:24:01,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:24:01,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:24:01,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:24:01,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:24:01,006 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:24:01,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:24:01,007 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:24:01,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:24:01,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:24:01,007 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:24:01,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:24:01,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:24:01,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:24:01,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:24:01,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:24:01,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:24:01,009 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:24:01,306 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:24:01,319 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:24:01,322 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:24:01,324 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:24:01,324 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:24:01,325 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-07-07 13:24:01,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b600688/80373f6e7f7e4c359053432337da220e/FLAGd6bba8a40 [2020-07-07 13:24:01,847 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:24:01,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-07-07 13:24:01,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b600688/80373f6e7f7e4c359053432337da220e/FLAGd6bba8a40 [2020-07-07 13:24:02,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b600688/80373f6e7f7e4c359053432337da220e [2020-07-07 13:24:02,283 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:24:02,285 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:24:02,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:02,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:24:02,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:24:02,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:02" (1/1) ... [2020-07-07 13:24:02,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce77b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02, skipping insertion in model container [2020-07-07 13:24:02,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:02" (1/1) ... [2020-07-07 13:24:02,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:24:02,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:24:02,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:02,550 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:24:02,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:02,590 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:24:02,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02 WrapperNode [2020-07-07 13:24:02,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:02,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:24:02,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:24:02,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:24:02,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02" (1/1) ... [2020-07-07 13:24:02,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02" (1/1) ... [2020-07-07 13:24:02,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02" (1/1) ... [2020-07-07 13:24:02,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02" (1/1) ... [2020-07-07 13:24:02,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02" (1/1) ... [2020-07-07 13:24:02,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02" (1/1) ... [2020-07-07 13:24:02,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02" (1/1) ... [2020-07-07 13:24:02,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:24:02,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:24:02,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:24:02,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:24:02,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02" (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 13:24:02,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:24:02,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:24:02,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-07 13:24:02,773 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-07-07 13:24:02,773 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-07-07 13:24:02,774 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-07-07 13:24:02,774 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-07-07 13:24:02,774 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-07-07 13:24:02,774 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-07-07 13:24:02,774 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-07-07 13:24:02,774 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-07-07 13:24:02,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:24:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:24:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-07 13:24:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:24:02,775 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-07-07 13:24:02,782 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-07-07 13:24:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-07-07 13:24:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-07-07 13:24:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-07-07 13:24:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-07-07 13:24:02,783 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-07-07 13:24:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-07-07 13:24:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:24:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:24:02,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:24:03,168 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:24:03,168 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 13:24:03,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:03 BoogieIcfgContainer [2020-07-07 13:24:03,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:24:03,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:24:03,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:24:03,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:24:03,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:24:02" (1/3) ... [2020-07-07 13:24:03,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a0fcec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:03, skipping insertion in model container [2020-07-07 13:24:03,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:02" (2/3) ... [2020-07-07 13:24:03,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a0fcec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:03, skipping insertion in model container [2020-07-07 13:24:03,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:03" (3/3) ... [2020-07-07 13:24:03,181 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-07-07 13:24:03,191 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:24:03,198 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:24:03,212 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:24:03,231 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:24:03,232 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:24:03,232 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:24:03,232 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:24:03,232 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:24:03,232 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:24:03,232 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:24:03,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:24:03,248 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-07-07 13:24:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 13:24:03,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:03,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:03,260 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1008214113, now seen corresponding path program 1 times [2020-07-07 13:24:03,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:03,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468722856] [2020-07-07 13:24:03,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:03,457 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 13:24:03,458 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:03,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468722856] [2020-07-07 13:24:03,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:03,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:24:03,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114449048] [2020-07-07 13:24:03,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:24:03,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:24:03,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:24:03,488 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 4 states. [2020-07-07 13:24:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:03,702 INFO L93 Difference]: Finished difference Result 199 states and 244 transitions. [2020-07-07 13:24:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:24:03,704 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-07-07 13:24:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:03,718 INFO L225 Difference]: With dead ends: 199 [2020-07-07 13:24:03,719 INFO L226 Difference]: Without dead ends: 101 [2020-07-07 13:24:03,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:24:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-07 13:24:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-07-07 13:24:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-07 13:24:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2020-07-07 13:24:03,790 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 19 [2020-07-07 13:24:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:03,791 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2020-07-07 13:24:03,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:24:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2020-07-07 13:24:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 13:24:03,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:03,793 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] [2020-07-07 13:24:03,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:24:03,794 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:03,794 INFO L82 PathProgramCache]: Analyzing trace with hash 837576233, now seen corresponding path program 1 times [2020-07-07 13:24:03,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:03,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378637879] [2020-07-07 13:24:03,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:03,978 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 13:24:03,978 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:03,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378637879] [2020-07-07 13:24:03,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:03,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:24:03,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706177953] [2020-07-07 13:24:03,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:24:03,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:03,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:24:03,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:24:03,985 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand 5 states. [2020-07-07 13:24:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:04,290 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2020-07-07 13:24:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:24:04,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-07 13:24:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:04,294 INFO L225 Difference]: With dead ends: 171 [2020-07-07 13:24:04,294 INFO L226 Difference]: Without dead ends: 164 [2020-07-07 13:24:04,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:24:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-07 13:24:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2020-07-07 13:24:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-07 13:24:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 190 transitions. [2020-07-07 13:24:04,347 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 190 transitions. Word has length 21 [2020-07-07 13:24:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:04,347 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 190 transitions. [2020-07-07 13:24:04,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:24:04,348 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 190 transitions. [2020-07-07 13:24:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 13:24:04,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:04,350 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 13:24:04,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:24:04,350 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:04,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:04,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1006142192, now seen corresponding path program 1 times [2020-07-07 13:24:04,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:04,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066167224] [2020-07-07 13:24:04,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:04,444 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 13:24:04,444 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:04,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066167224] [2020-07-07 13:24:04,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:04,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:24:04,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242002949] [2020-07-07 13:24:04,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:24:04,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:04,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:24:04,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:24:04,447 INFO L87 Difference]: Start difference. First operand 160 states and 190 transitions. Second operand 6 states. [2020-07-07 13:24:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:04,728 INFO L93 Difference]: Finished difference Result 411 states and 514 transitions. [2020-07-07 13:24:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:24:04,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-07 13:24:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:04,738 INFO L225 Difference]: With dead ends: 411 [2020-07-07 13:24:04,738 INFO L226 Difference]: Without dead ends: 265 [2020-07-07 13:24:04,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:24:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-07 13:24:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 200. [2020-07-07 13:24:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-07 13:24:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 243 transitions. [2020-07-07 13:24:04,775 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 243 transitions. Word has length 38 [2020-07-07 13:24:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:04,776 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 243 transitions. [2020-07-07 13:24:04,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:24:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 243 transitions. [2020-07-07 13:24:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-07 13:24:04,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:04,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:24:04,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:24:04,779 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:04,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:04,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1762986505, now seen corresponding path program 1 times [2020-07-07 13:24:04,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:04,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074910770] [2020-07-07 13:24:04,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:04,953 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 13:24:04,953 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:04,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074910770] [2020-07-07 13:24:04,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:04,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:24:04,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084139147] [2020-07-07 13:24:04,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:24:04,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:04,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:24:04,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:24:04,956 INFO L87 Difference]: Start difference. First operand 200 states and 243 transitions. Second operand 9 states. [2020-07-07 13:24:05,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:05,372 INFO L93 Difference]: Finished difference Result 575 states and 738 transitions. [2020-07-07 13:24:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 13:24:05,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-07-07 13:24:05,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:05,377 INFO L225 Difference]: With dead ends: 575 [2020-07-07 13:24:05,377 INFO L226 Difference]: Without dead ends: 389 [2020-07-07 13:24:05,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-07-07 13:24:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-07-07 13:24:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 280. [2020-07-07 13:24:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-07 13:24:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 349 transitions. [2020-07-07 13:24:05,416 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 349 transitions. Word has length 59 [2020-07-07 13:24:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:05,416 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 349 transitions. [2020-07-07 13:24:05,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 13:24:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 349 transitions. [2020-07-07 13:24:05,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 13:24:05,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:05,420 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 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 13:24:05,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:24:05,420 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash -586168855, now seen corresponding path program 1 times [2020-07-07 13:24:05,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:05,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165251918] [2020-07-07 13:24:05,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:05,580 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 13:24:05,581 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:05,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165251918] [2020-07-07 13:24:05,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:05,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:24:05,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497005929] [2020-07-07 13:24:05,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:24:05,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:05,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:24:05,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:24:05,584 INFO L87 Difference]: Start difference. First operand 280 states and 349 transitions. Second operand 8 states. [2020-07-07 13:24:05,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:05,983 INFO L93 Difference]: Finished difference Result 773 states and 1000 transitions. [2020-07-07 13:24:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 13:24:05,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-07-07 13:24:05,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:05,988 INFO L225 Difference]: With dead ends: 773 [2020-07-07 13:24:05,988 INFO L226 Difference]: Without dead ends: 507 [2020-07-07 13:24:05,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-07-07 13:24:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-07-07 13:24:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 360. [2020-07-07 13:24:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-07-07 13:24:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 461 transitions. [2020-07-07 13:24:06,030 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 461 transitions. Word has length 79 [2020-07-07 13:24:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:06,031 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 461 transitions. [2020-07-07 13:24:06,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:24:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 461 transitions. [2020-07-07 13:24:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-07 13:24:06,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:06,033 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:24:06,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:24:06,034 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1731656998, now seen corresponding path program 1 times [2020-07-07 13:24:06,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:06,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981638173] [2020-07-07 13:24:06,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:06,135 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 13:24:06,137 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:06,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981638173] [2020-07-07 13:24:06,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:06,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:24:06,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621617722] [2020-07-07 13:24:06,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:24:06,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:06,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:24:06,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:24:06,140 INFO L87 Difference]: Start difference. First operand 360 states and 461 transitions. Second operand 6 states. [2020-07-07 13:24:06,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:06,333 INFO L93 Difference]: Finished difference Result 679 states and 876 transitions. [2020-07-07 13:24:06,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:24:06,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-07-07 13:24:06,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:06,339 INFO L225 Difference]: With dead ends: 679 [2020-07-07 13:24:06,339 INFO L226 Difference]: Without dead ends: 333 [2020-07-07 13:24:06,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:24:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-07-07 13:24:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 192. [2020-07-07 13:24:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-07 13:24:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2020-07-07 13:24:06,368 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 101 [2020-07-07 13:24:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:06,369 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2020-07-07 13:24:06,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:24:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2020-07-07 13:24:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-07 13:24:06,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:06,372 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:24:06,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:24:06,372 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1350272370, now seen corresponding path program 1 times [2020-07-07 13:24:06,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:06,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162570802] [2020-07-07 13:24:06,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:06,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:24:06,392 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 13:24:06,403 INFO L168 Benchmark]: Toolchain (without parser) took 4114.05 ms. Allocated memory was 134.7 MB in the beginning and 255.3 MB in the end (delta: 120.6 MB). Free memory was 98.9 MB in the beginning and 186.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:06,403 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 134.7 MB. Free memory was 117.5 MB in the beginning and 117.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 13:24:06,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.94 ms. Allocated memory is still 134.7 MB. Free memory was 98.7 MB in the beginning and 88.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:06,407 INFO L168 Benchmark]: Boogie Preprocessor took 119.57 ms. Allocated memory was 134.7 MB in the beginning and 198.2 MB in the end (delta: 63.4 MB). Free memory was 88.4 MB in the beginning and 176.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:06,408 INFO L168 Benchmark]: RCFGBuilder took 461.58 ms. Allocated memory is still 198.2 MB. Free memory was 176.2 MB in the beginning and 154.7 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:06,409 INFO L168 Benchmark]: TraceAbstraction took 3222.90 ms. Allocated memory was 198.2 MB in the beginning and 255.3 MB in the end (delta: 57.1 MB). Free memory was 154.7 MB in the beginning and 186.9 MB in the end (delta: -32.2 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:06,419 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 134.7 MB. Free memory was 117.5 MB in the beginning and 117.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.94 ms. Allocated memory is still 134.7 MB. Free memory was 98.7 MB in the beginning and 88.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.57 ms. Allocated memory was 134.7 MB in the beginning and 198.2 MB in the end (delta: 63.4 MB). Free memory was 88.4 MB in the beginning and 176.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 461.58 ms. Allocated memory is still 198.2 MB. Free memory was 176.2 MB in the beginning and 154.7 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3222.90 ms. Allocated memory was 198.2 MB in the beginning and 255.3 MB in the end (delta: 57.1 MB). Free memory was 154.7 MB in the beginning and 186.9 MB in the end (delta: -32.2 MB). Peak memory consumption was 24.9 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...