/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 0.1.25-3af5e1f [2020-09-04 16:40:03,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:40:03,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:40:03,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:40:03,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:40:03,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:40:03,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:40:03,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:40:03,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:40:03,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:40:03,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:40:03,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:40:03,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:40:03,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:40:03,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:40:03,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:40:03,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:40:03,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:40:03,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:40:03,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:40:03,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:40:03,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:40:03,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:40:03,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:40:03,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:40:04,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:40:04,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:40:04,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:40:04,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:40:04,029 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:40:04,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:40:04,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:40:04,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:40:04,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:40:04,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:40:04,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:40:04,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:40:04,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:40:04,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:40:04,034 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:40:04,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:40:04,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:40:04,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:40:04,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:40:04,035 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:40:04,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:40:04,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:40:04,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:40:04,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:40:04,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:40:04,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:40:04,037 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:40:04,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:40:04,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:40:04,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:40:04,531 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:40:04,534 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:40:04,535 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-09-04 16:40:04,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97f8f6961/af34d8c795d04d22b5f8df5bf9864b8d/FLAGe644b2715 [2020-09-04 16:40:05,149 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:40:05,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/stateful_check.c [2020-09-04 16:40:05,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97f8f6961/af34d8c795d04d22b5f8df5bf9864b8d/FLAGe644b2715 [2020-09-04 16:40:05,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97f8f6961/af34d8c795d04d22b5f8df5bf9864b8d [2020-09-04 16:40:05,501 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:40:05,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:40:05,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:40:05,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:40:05,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:40:05,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:40:05" (1/1) ... [2020-09-04 16:40:05,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36801391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05, skipping insertion in model container [2020-09-04 16:40:05,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:40:05" (1/1) ... [2020-09-04 16:40:05,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:40:05,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:40:05,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:40:05,836 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:40:05,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:40:05,876 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:40:05,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05 WrapperNode [2020-09-04 16:40:05,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:40:05,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:40:05,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:40:05,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:40:05,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05" (1/1) ... [2020-09-04 16:40:05,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05" (1/1) ... [2020-09-04 16:40:05,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05" (1/1) ... [2020-09-04 16:40:05,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05" (1/1) ... [2020-09-04 16:40:05,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05" (1/1) ... [2020-09-04 16:40:06,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05" (1/1) ... [2020-09-04 16:40:06,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05" (1/1) ... [2020-09-04 16:40:06,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:40:06,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:40:06,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:40:06,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:40:06,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:40:06,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:40:06,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:40:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-09-04 16:40:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-09-04 16:40:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-09-04 16:40:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure check_final_state [2020-09-04 16:40:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_release [2020-09-04 16:40:06,091 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_llseek [2020-09-04 16:40:06,092 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_read [2020-09-04 16:40:06,092 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_open [2020-09-04 16:40:06,092 INFO L138 BoogieDeclarations]: Found implementation of procedure my_init [2020-09-04 16:40:06,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:40:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:40:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-09-04 16:40:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:40:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-09-04 16:40:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-09-04 16:40:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure check_final_state [2020-09-04 16:40:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure misc_release [2020-09-04 16:40:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure misc_llseek [2020-09-04 16:40:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure misc_read [2020-09-04 16:40:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure misc_open [2020-09-04 16:40:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure my_init [2020-09-04 16:40:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:40:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:40:06,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:40:06,495 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:40:06,495 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 16:40:06,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:40:06 BoogieIcfgContainer [2020-09-04 16:40:06,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:40:06,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:40:06,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:40:06,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:40:06,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:40:05" (1/3) ... [2020-09-04 16:40:06,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b743638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:40:06, skipping insertion in model container [2020-09-04 16:40:06,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:05" (2/3) ... [2020-09-04 16:40:06,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b743638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:40:06, skipping insertion in model container [2020-09-04 16:40:06,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:40:06" (3/3) ... [2020-09-04 16:40:06,511 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-09-04 16:40:06,521 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:40:06,530 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:40:06,549 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:40:06,574 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:40:06,575 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:40:06,575 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:40:06,575 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:40:06,575 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:40:06,575 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:40:06,575 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:40:06,575 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:40:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-04 16:40:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 16:40:06,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:06,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:40:06,607 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:06,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:06,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1008214113, now seen corresponding path program 1 times [2020-09-04 16:40:06,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:06,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428886782] [2020-09-04 16:40:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:06,697 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:06,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:06,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:40:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:06,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428886782] [2020-09-04 16:40:06,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:06,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:40:06,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742294906] [2020-09-04 16:40:06,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:40:06,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:40:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:40:06,882 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 4 states. [2020-09-04 16:40:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:07,106 INFO L93 Difference]: Finished difference Result 199 states and 244 transitions. [2020-09-04 16:40:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 16:40:07,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-09-04 16:40:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:07,126 INFO L225 Difference]: With dead ends: 199 [2020-09-04 16:40:07,126 INFO L226 Difference]: Without dead ends: 101 [2020-09-04 16:40:07,132 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 [2020-09-04 16:40:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-04 16:40:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-09-04 16:40:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-04 16:40:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2020-09-04 16:40:07,209 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 19 [2020-09-04 16:40:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:07,210 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2020-09-04 16:40:07,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:40:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2020-09-04 16:40:07,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 16:40:07,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:07,211 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] [2020-09-04 16:40:07,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:40:07,212 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:07,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 837576233, now seen corresponding path program 1 times [2020-09-04 16:40:07,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:07,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056232219] [2020-09-04 16:40:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:07,216 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:07,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:07,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:40:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:07,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056232219] [2020-09-04 16:40:07,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:07,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 16:40:07,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995984578] [2020-09-04 16:40:07,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 16:40:07,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:07,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 16:40:07,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:40:07,329 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand 5 states. [2020-09-04 16:40:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:07,613 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2020-09-04 16:40:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:40:07,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-04 16:40:07,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:07,617 INFO L225 Difference]: With dead ends: 171 [2020-09-04 16:40:07,617 INFO L226 Difference]: Without dead ends: 164 [2020-09-04 16:40:07,619 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 [2020-09-04 16:40:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-04 16:40:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2020-09-04 16:40:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-04 16:40:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 190 transitions. [2020-09-04 16:40:07,653 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 190 transitions. Word has length 21 [2020-09-04 16:40:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:07,653 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 190 transitions. [2020-09-04 16:40:07,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 16:40:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 190 transitions. [2020-09-04 16:40:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 16:40:07,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:07,656 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] [2020-09-04 16:40:07,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:40:07,657 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1006142192, now seen corresponding path program 1 times [2020-09-04 16:40:07,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:07,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520527231] [2020-09-04 16:40:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:07,660 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:07,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:07,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:40:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:07,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 16:40:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:07,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520527231] [2020-09-04 16:40:07,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:07,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:40:07,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626426185] [2020-09-04 16:40:07,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:40:07,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:07,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:40:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:40:07,801 INFO L87 Difference]: Start difference. First operand 160 states and 190 transitions. Second operand 6 states. [2020-09-04 16:40:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:08,083 INFO L93 Difference]: Finished difference Result 411 states and 514 transitions. [2020-09-04 16:40:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 16:40:08,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-09-04 16:40:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:08,089 INFO L225 Difference]: With dead ends: 411 [2020-09-04 16:40:08,089 INFO L226 Difference]: Without dead ends: 265 [2020-09-04 16:40:08,094 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 [2020-09-04 16:40:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-04 16:40:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 200. [2020-09-04 16:40:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-04 16:40:08,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 243 transitions. [2020-09-04 16:40:08,145 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 243 transitions. Word has length 38 [2020-09-04 16:40:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:08,145 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 243 transitions. [2020-09-04 16:40:08,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:40:08,145 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 243 transitions. [2020-09-04 16:40:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-04 16:40:08,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:08,148 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] [2020-09-04 16:40:08,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:40:08,148 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:08,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1762986505, now seen corresponding path program 1 times [2020-09-04 16:40:08,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:08,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947839740] [2020-09-04 16:40:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:08,182 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:40:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 16:40:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-04 16:40:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:08,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947839740] [2020-09-04 16:40:08,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:08,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:40:08,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518406073] [2020-09-04 16:40:08,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:40:08,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:40:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:40:08,301 INFO L87 Difference]: Start difference. First operand 200 states and 243 transitions. Second operand 8 states. [2020-09-04 16:40:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:08,728 INFO L93 Difference]: Finished difference Result 573 states and 736 transitions. [2020-09-04 16:40:08,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 16:40:08,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-04 16:40:08,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:08,738 INFO L225 Difference]: With dead ends: 573 [2020-09-04 16:40:08,738 INFO L226 Difference]: Without dead ends: 387 [2020-09-04 16:40:08,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:40:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-09-04 16:40:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 240. [2020-09-04 16:40:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-04 16:40:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 298 transitions. [2020-09-04 16:40:08,783 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 298 transitions. Word has length 59 [2020-09-04 16:40:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:08,784 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 298 transitions. [2020-09-04 16:40:08,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:40:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 298 transitions. [2020-09-04 16:40:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 16:40:08,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:08,788 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] [2020-09-04 16:40:08,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:40:08,788 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:08,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:08,789 INFO L82 PathProgramCache]: Analyzing trace with hash -586168855, now seen corresponding path program 1 times [2020-09-04 16:40:08,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:08,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829714857] [2020-09-04 16:40:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:08,804 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:40:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 16:40:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-04 16:40:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-04 16:40:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:08,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829714857] [2020-09-04 16:40:08,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:08,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 16:40:08,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318545183] [2020-09-04 16:40:08,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 16:40:08,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:08,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 16:40:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:40:08,919 INFO L87 Difference]: Start difference. First operand 240 states and 298 transitions. Second operand 8 states. [2020-09-04 16:40:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:09,307 INFO L93 Difference]: Finished difference Result 733 states and 952 transitions. [2020-09-04 16:40:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 16:40:09,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-09-04 16:40:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:09,314 INFO L225 Difference]: With dead ends: 733 [2020-09-04 16:40:09,314 INFO L226 Difference]: Without dead ends: 507 [2020-09-04 16:40:09,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:40:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-09-04 16:40:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 320. [2020-09-04 16:40:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-09-04 16:40:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 410 transitions. [2020-09-04 16:40:09,354 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 410 transitions. Word has length 79 [2020-09-04 16:40:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:09,359 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 410 transitions. [2020-09-04 16:40:09,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 16:40:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 410 transitions. [2020-09-04 16:40:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-04 16:40:09,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:09,373 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] [2020-09-04 16:40:09,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:40:09,376 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:09,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1731656998, now seen corresponding path program 1 times [2020-09-04 16:40:09,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:09,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758131407] [2020-09-04 16:40:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:09,389 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:09,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:09,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:40:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:09,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-04 16:40:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:09,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-04 16:40:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:09,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-04 16:40:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:09,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-04 16:40:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:09,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758131407] [2020-09-04 16:40:09,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:09,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:40:09,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045296673] [2020-09-04 16:40:09,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:40:09,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:09,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:40:09,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:40:09,575 INFO L87 Difference]: Start difference. First operand 320 states and 410 transitions. Second operand 6 states. [2020-09-04 16:40:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:09,744 INFO L93 Difference]: Finished difference Result 599 states and 775 transitions. [2020-09-04 16:40:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:40:09,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-09-04 16:40:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:09,748 INFO L225 Difference]: With dead ends: 599 [2020-09-04 16:40:09,748 INFO L226 Difference]: Without dead ends: 293 [2020-09-04 16:40:09,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-04 16:40:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-09-04 16:40:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 172. [2020-09-04 16:40:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-04 16:40:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 211 transitions. [2020-09-04 16:40:09,771 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 211 transitions. Word has length 101 [2020-09-04 16:40:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:09,771 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 211 transitions. [2020-09-04 16:40:09,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:40:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 211 transitions. [2020-09-04 16:40:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-04 16:40:09,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:09,773 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] [2020-09-04 16:40:09,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:40:09,774 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:09,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1350272370, now seen corresponding path program 1 times [2020-09-04 16:40:09,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:09,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866395248] [2020-09-04 16:40:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:09,781 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:40:09,800 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:40:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:40:09,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:40:09,851 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:40:09,851 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:40:09,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:40:09,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:40:09 BoogieIcfgContainer [2020-09-04 16:40:09,878 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:40:09,881 INFO L168 Benchmark]: Toolchain (without parser) took 4377.06 ms. Allocated memory was 138.9 MB in the beginning and 250.1 MB in the end (delta: 111.1 MB). Free memory was 101.5 MB in the beginning and 166.5 MB in the end (delta: -65.0 MB). Peak memory consumption was 46.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:09,882 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 16:40:09,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.87 ms. Allocated memory is still 138.9 MB. Free memory was 101.3 MB in the beginning and 90.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:09,884 INFO L168 Benchmark]: Boogie Preprocessor took 130.70 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 90.5 MB in the beginning and 180.9 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:09,885 INFO L168 Benchmark]: RCFGBuilder took 492.56 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 159.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:09,886 INFO L168 Benchmark]: TraceAbstraction took 3375.03 ms. Allocated memory was 202.9 MB in the beginning and 250.1 MB in the end (delta: 47.2 MB). Free memory was 158.4 MB in the beginning and 166.5 MB in the end (delta: -8.1 MB). Peak memory consumption was 39.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:09,889 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 372.87 ms. Allocated memory is still 138.9 MB. Free memory was 101.3 MB in the beginning and 90.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.70 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 90.5 MB in the beginning and 180.9 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 492.56 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 159.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3375.03 ms. Allocated memory was 202.9 MB in the beginning and 250.1 MB in the end (delta: 47.2 MB). Free memory was 158.4 MB in the beginning and 166.5 MB in the end (delta: -8.1 MB). Peak memory consumption was 39.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] int ldv_mutex = 1; [L11] int open_called = 0; [L74] int ldv_s_misc_fops_file_operations = 0; [L75] CALL my_init() [L69] open_called = 0 [L70] return 0; [L75] RET my_init() [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L81] COND TRUE ldv_s_misc_fops_file_operations==0 [L82] CALL misc_open() [L57] COND TRUE __VERIFIER_nondet_int() [L59] return 1; [L82] RET misc_open() [L83] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L89] COND TRUE ldv_s_misc_fops_file_operations==1 [L90] CALL misc_read() [L52] return 0; [L90] RET misc_read() [L91] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L97] COND TRUE ldv_s_misc_fops_file_operations==2 [L98] CALL misc_llseek() [L48] return 0; [L98] RET misc_llseek() [L99] ldv_s_misc_fops_file_operations++ [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L104] case 3: [L105] COND TRUE ldv_s_misc_fops_file_operations==3 [L106] CALL misc_release() [L34] COND FALSE !(\read(open_called)) [L41] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L17] ldv_mutex = 2 [L41] RET mutex_lock() [L42] CALL mutex_lock() [L16] (ldv_mutex == 1) ? 0 : __blast_assert() [L16] CALL __blast_assert() [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 105 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.2s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 592 SDtfs, 848 SDslu, 1333 SDs, 0 SdLazy, 801 SolverSat, 222 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=320occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 529 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...