/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/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:46:04,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:04,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:04,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:46:04,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:46:04,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:46:04,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:46:04,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:46:04,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:46:04,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:46:04,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:46:04,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:46:04,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:04,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:04,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:04,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:04,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:04,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:04,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:04,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:04,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:04,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:04,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:04,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:04,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:46:04,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:46:04,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:46:04,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:46:04,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:46:04,884 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:04,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:04,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:04,887 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:04,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:04,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:04,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:04,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:04,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:04,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:04,889 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:04,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:04,890 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:04,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:04,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:04,891 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:04,891 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:04,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:04,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:04,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:04,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:04,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:04,892 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:05,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:05,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:05,224 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:05,226 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:05,226 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:05,227 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 19:46:05,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a662d607a/e29dc06397f948bf8b58423dc91e72c6/FLAGf2cbe288c [2020-08-22 19:46:05,855 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:05,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 19:46:05,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a662d607a/e29dc06397f948bf8b58423dc91e72c6/FLAGf2cbe288c [2020-08-22 19:46:06,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a662d607a/e29dc06397f948bf8b58423dc91e72c6 [2020-08-22 19:46:06,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:06,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:06,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:06,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:06,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:06,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:06" (1/1) ... [2020-08-22 19:46:06,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@746dc2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06, skipping insertion in model container [2020-08-22 19:46:06,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:06" (1/1) ... [2020-08-22 19:46:06,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:06,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:06,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:06,456 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:06,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:06,605 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:06,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06 WrapperNode [2020-08-22 19:46:06,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:06,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:06,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:06,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:06,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06" (1/1) ... [2020-08-22 19:46:06,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06" (1/1) ... [2020-08-22 19:46:06,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06" (1/1) ... [2020-08-22 19:46:06,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06" (1/1) ... [2020-08-22 19:46:06,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06" (1/1) ... [2020-08-22 19:46:06,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06" (1/1) ... [2020-08-22 19:46:06,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06" (1/1) ... [2020-08-22 19:46:06,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:06,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:06,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:06,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:06,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06" (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 [2020-08-22 19:46:06,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:06,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:06,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:46:06,727 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-22 19:46:06,727 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-22 19:46:06,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 19:46:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-22 19:46:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-22 19:46:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-22 19:46:06,728 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-22 19:46:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-22 19:46:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-22 19:46:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-22 19:46:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-22 19:46:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-22 19:46:06,729 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-22 19:46:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-22 19:46:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-22 19:46:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-22 19:46:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-22 19:46:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-22 19:46:06,730 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-22 19:46:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-22 19:46:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-22 19:46:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-22 19:46:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-22 19:46:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-22 19:46:06,731 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-22 19:46:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-22 19:46:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-22 19:46:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-22 19:46:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-22 19:46:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:46:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:46:06,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:46:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:46:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:06,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:07,243 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:07,244 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 19:46:07,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:07 BoogieIcfgContainer [2020-08-22 19:46:07,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:07,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:07,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:07,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:07,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:06" (1/3) ... [2020-08-22 19:46:07,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c37f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:07, skipping insertion in model container [2020-08-22 19:46:07,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:06" (2/3) ... [2020-08-22 19:46:07,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c37f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:07, skipping insertion in model container [2020-08-22 19:46:07,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:07" (3/3) ... [2020-08-22 19:46:07,270 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 19:46:07,282 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:07,293 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:46:07,310 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:46:07,341 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:07,342 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:07,342 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:07,342 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:07,343 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:07,343 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:07,343 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:07,344 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:07,377 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states. [2020-08-22 19:46:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 19:46:07,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:07,394 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:07,394 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:07,402 INFO L82 PathProgramCache]: Analyzing trace with hash 593727157, now seen corresponding path program 1 times [2020-08-22 19:46:07,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:07,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237662394] [2020-08-22 19:46:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:07,488 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:07,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:07,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 19:46:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:07,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237662394] [2020-08-22 19:46:07,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:07,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:46:07,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779962686] [2020-08-22 19:46:07,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:46:07,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:07,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:46:07,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:46:07,694 INFO L87 Difference]: Start difference. First operand 135 states. Second operand 3 states. [2020-08-22 19:46:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:08,111 INFO L93 Difference]: Finished difference Result 254 states and 290 transitions. [2020-08-22 19:46:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:46:08,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-08-22 19:46:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:08,136 INFO L225 Difference]: With dead ends: 254 [2020-08-22 19:46:08,137 INFO L226 Difference]: Without dead ends: 111 [2020-08-22 19:46:08,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:46:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-22 19:46:08,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-08-22 19:46:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 19:46:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-08-22 19:46:08,224 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 51 [2020-08-22 19:46:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:08,225 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-08-22 19:46:08,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:46:08,225 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-08-22 19:46:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 19:46:08,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:08,228 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:08,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:08,229 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:08,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1128985001, now seen corresponding path program 1 times [2020-08-22 19:46:08,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:08,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844378137] [2020-08-22 19:46:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:08,234 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:08,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:08,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 19:46:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:08,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844378137] [2020-08-22 19:46:08,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:08,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:08,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971186157] [2020-08-22 19:46:08,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:08,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:08,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:08,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:08,324 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 4 states. [2020-08-22 19:46:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:08,620 INFO L93 Difference]: Finished difference Result 212 states and 232 transitions. [2020-08-22 19:46:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:08,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-08-22 19:46:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:08,623 INFO L225 Difference]: With dead ends: 212 [2020-08-22 19:46:08,623 INFO L226 Difference]: Without dead ends: 117 [2020-08-22 19:46:08,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-08-22 19:46:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2020-08-22 19:46:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 19:46:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-08-22 19:46:08,642 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 63 [2020-08-22 19:46:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:08,643 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-08-22 19:46:08,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-08-22 19:46:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 19:46:08,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:08,646 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:08,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:08,646 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:08,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:08,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1210839627, now seen corresponding path program 1 times [2020-08-22 19:46:08,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:08,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973527612] [2020-08-22 19:46:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:08,669 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:08,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:08,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 19:46:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:08,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973527612] [2020-08-22 19:46:08,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:08,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:08,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442242698] [2020-08-22 19:46:08,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:08,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:08,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:08,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:08,769 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 6 states. [2020-08-22 19:46:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:09,051 INFO L93 Difference]: Finished difference Result 219 states and 239 transitions. [2020-08-22 19:46:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:46:09,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-08-22 19:46:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:09,054 INFO L225 Difference]: With dead ends: 219 [2020-08-22 19:46:09,054 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 19:46:09,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:09,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 19:46:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-08-22 19:46:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 19:46:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-08-22 19:46:09,072 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 70 [2020-08-22 19:46:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:09,072 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-08-22 19:46:09,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-08-22 19:46:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 19:46:09,076 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:09,076 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:09,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:09,077 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash -257337495, now seen corresponding path program 2 times [2020-08-22 19:46:09,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:09,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934335625] [2020-08-22 19:46:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:09,086 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:09,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:09,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 19:46:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:09,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934335625] [2020-08-22 19:46:09,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:09,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:46:09,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326336646] [2020-08-22 19:46:09,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:46:09,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:09,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:46:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:09,252 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 8 states. [2020-08-22 19:46:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:09,564 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2020-08-22 19:46:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:46:09,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-08-22 19:46:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:09,566 INFO L225 Difference]: With dead ends: 226 [2020-08-22 19:46:09,566 INFO L226 Difference]: Without dead ends: 131 [2020-08-22 19:46:09,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:46:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-08-22 19:46:09,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2020-08-22 19:46:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 19:46:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2020-08-22 19:46:09,584 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 77 [2020-08-22 19:46:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:09,584 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2020-08-22 19:46:09,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:46:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2020-08-22 19:46:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 19:46:09,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:09,593 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:09,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:46:09,596 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash 883135627, now seen corresponding path program 3 times [2020-08-22 19:46:09,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:09,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554795245] [2020-08-22 19:46:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:09,603 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:09,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:09,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 19:46:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:09,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554795245] [2020-08-22 19:46:09,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:09,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:46:09,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655064568] [2020-08-22 19:46:09,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:46:09,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:46:09,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:09,775 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand 10 states. [2020-08-22 19:46:10,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:10,080 INFO L93 Difference]: Finished difference Result 233 states and 253 transitions. [2020-08-22 19:46:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:46:10,081 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-08-22 19:46:10,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:10,082 INFO L225 Difference]: With dead ends: 233 [2020-08-22 19:46:10,082 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 19:46:10,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:46:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 19:46:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2020-08-22 19:46:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-08-22 19:46:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-08-22 19:46:10,100 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 84 [2020-08-22 19:46:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:10,101 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-08-22 19:46:10,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:46:10,101 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-08-22 19:46:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 19:46:10,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:10,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:10,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:46:10,104 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash -687690455, now seen corresponding path program 4 times [2020-08-22 19:46:10,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:10,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913058817] [2020-08-22 19:46:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:10,110 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:10,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 19:46:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:10,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913058817] [2020-08-22 19:46:10,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:10,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:46:10,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711733178] [2020-08-22 19:46:10,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:46:10,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:10,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:46:10,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:46:10,279 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 12 states. [2020-08-22 19:46:10,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:10,636 INFO L93 Difference]: Finished difference Result 240 states and 260 transitions. [2020-08-22 19:46:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:46:10,637 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-08-22 19:46:10,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:10,639 INFO L225 Difference]: With dead ends: 240 [2020-08-22 19:46:10,640 INFO L226 Difference]: Without dead ends: 145 [2020-08-22 19:46:10,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:46:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-22 19:46:10,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2020-08-22 19:46:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 19:46:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-08-22 19:46:10,653 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 91 [2020-08-22 19:46:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:10,653 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-08-22 19:46:10,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:46:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-08-22 19:46:10,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 19:46:10,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:10,655 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:10,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:46:10,656 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash -722319669, now seen corresponding path program 5 times [2020-08-22 19:46:10,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:10,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926952910] [2020-08-22 19:46:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:10,669 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:10,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:10,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 19:46:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:10,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926952910] [2020-08-22 19:46:10,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:10,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:46:10,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045716505] [2020-08-22 19:46:10,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:46:10,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:10,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:46:10,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:46:10,847 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 14 states. [2020-08-22 19:46:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:11,269 INFO L93 Difference]: Finished difference Result 247 states and 267 transitions. [2020-08-22 19:46:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:46:11,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2020-08-22 19:46:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:11,272 INFO L225 Difference]: With dead ends: 247 [2020-08-22 19:46:11,272 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 19:46:11,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-08-22 19:46:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 19:46:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-08-22 19:46:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-08-22 19:46:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 157 transitions. [2020-08-22 19:46:11,288 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 157 transitions. Word has length 98 [2020-08-22 19:46:11,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:11,289 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 157 transitions. [2020-08-22 19:46:11,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:46:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 157 transitions. [2020-08-22 19:46:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-22 19:46:11,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:11,290 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:11,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:46:11,291 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:11,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1819472617, now seen corresponding path program 6 times [2020-08-22 19:46:11,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:11,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502264340] [2020-08-22 19:46:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:11,298 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:11,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:11,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 19:46:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:11,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502264340] [2020-08-22 19:46:11,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:11,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 19:46:11,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632976050] [2020-08-22 19:46:11,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:46:11,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:46:11,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:46:11,544 INFO L87 Difference]: Start difference. First operand 147 states and 157 transitions. Second operand 16 states. [2020-08-22 19:46:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:12,075 INFO L93 Difference]: Finished difference Result 254 states and 274 transitions. [2020-08-22 19:46:12,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 19:46:12,076 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-08-22 19:46:12,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:12,078 INFO L225 Difference]: With dead ends: 254 [2020-08-22 19:46:12,078 INFO L226 Difference]: Without dead ends: 159 [2020-08-22 19:46:12,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-08-22 19:46:12,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-08-22 19:46:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2020-08-22 19:46:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-08-22 19:46:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 164 transitions. [2020-08-22 19:46:12,089 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 164 transitions. Word has length 105 [2020-08-22 19:46:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:12,090 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 164 transitions. [2020-08-22 19:46:12,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:46:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 164 transitions. [2020-08-22 19:46:12,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 19:46:12,092 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:12,092 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:12,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:46:12,093 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash -612628213, now seen corresponding path program 7 times [2020-08-22 19:46:12,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:12,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336056213] [2020-08-22 19:46:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:12,102 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 19:46:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:12,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336056213] [2020-08-22 19:46:12,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:12,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:46:12,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414546141] [2020-08-22 19:46:12,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:46:12,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:46:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:46:12,379 INFO L87 Difference]: Start difference. First operand 154 states and 164 transitions. Second operand 18 states. [2020-08-22 19:46:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:12,809 INFO L93 Difference]: Finished difference Result 256 states and 276 transitions. [2020-08-22 19:46:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 19:46:12,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2020-08-22 19:46:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:12,812 INFO L225 Difference]: With dead ends: 256 [2020-08-22 19:46:12,812 INFO L226 Difference]: Without dead ends: 161 [2020-08-22 19:46:12,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-08-22 19:46:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-08-22 19:46:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-08-22 19:46:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 19:46:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 171 transitions. [2020-08-22 19:46:12,823 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 171 transitions. Word has length 112 [2020-08-22 19:46:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:12,823 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 171 transitions. [2020-08-22 19:46:12,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:46:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 171 transitions. [2020-08-22 19:46:12,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 19:46:12,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:12,826 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:12,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:46:12,826 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:12,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:12,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1175857321, now seen corresponding path program 8 times [2020-08-22 19:46:12,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:12,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792279603] [2020-08-22 19:46:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:12,834 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 19:46:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:12,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792279603] [2020-08-22 19:46:12,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:12,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:12,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873420488] [2020-08-22 19:46:12,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:12,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:12,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:12,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:12,930 INFO L87 Difference]: Start difference. First operand 161 states and 171 transitions. Second operand 4 states. [2020-08-22 19:46:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:13,097 INFO L93 Difference]: Finished difference Result 249 states and 269 transitions. [2020-08-22 19:46:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:13,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-08-22 19:46:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:13,100 INFO L225 Difference]: With dead ends: 249 [2020-08-22 19:46:13,100 INFO L226 Difference]: Without dead ends: 162 [2020-08-22 19:46:13,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-22 19:46:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-08-22 19:46:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 19:46:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 172 transitions. [2020-08-22 19:46:13,110 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 172 transitions. Word has length 119 [2020-08-22 19:46:13,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:13,111 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 172 transitions. [2020-08-22 19:46:13,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 172 transitions. [2020-08-22 19:46:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 19:46:13,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:13,113 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:13,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:46:13,114 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:13,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1395739916, now seen corresponding path program 1 times [2020-08-22 19:46:13,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:13,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098211563] [2020-08-22 19:46:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:13,122 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 19:46:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:13,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098211563] [2020-08-22 19:46:13,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:13,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:46:13,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438588600] [2020-08-22 19:46:13,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:46:13,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:46:13,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:13,260 INFO L87 Difference]: Start difference. First operand 162 states and 172 transitions. Second operand 8 states. [2020-08-22 19:46:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:13,679 INFO L93 Difference]: Finished difference Result 427 states and 473 transitions. [2020-08-22 19:46:13,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:46:13,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-22 19:46:13,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:13,686 INFO L225 Difference]: With dead ends: 427 [2020-08-22 19:46:13,687 INFO L226 Difference]: Without dead ends: 336 [2020-08-22 19:46:13,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:46:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-08-22 19:46:13,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 199. [2020-08-22 19:46:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-22 19:46:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 217 transitions. [2020-08-22 19:46:13,734 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 217 transitions. Word has length 121 [2020-08-22 19:46:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:13,735 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 217 transitions. [2020-08-22 19:46:13,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:46:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 217 transitions. [2020-08-22 19:46:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 19:46:13,737 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:13,737 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:13,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:46:13,737 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:13,738 INFO L82 PathProgramCache]: Analyzing trace with hash 454539305, now seen corresponding path program 1 times [2020-08-22 19:46:13,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:13,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758999686] [2020-08-22 19:46:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:13,748 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 19:46:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:13,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758999686] [2020-08-22 19:46:13,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:13,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:13,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821170951] [2020-08-22 19:46:13,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:13,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:13,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:13,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:13,849 INFO L87 Difference]: Start difference. First operand 199 states and 217 transitions. Second operand 4 states. [2020-08-22 19:46:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:14,064 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2020-08-22 19:46:14,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:14,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-08-22 19:46:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:14,067 INFO L225 Difference]: With dead ends: 289 [2020-08-22 19:46:14,067 INFO L226 Difference]: Without dead ends: 200 [2020-08-22 19:46:14,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-22 19:46:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-08-22 19:46:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 19:46:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 217 transitions. [2020-08-22 19:46:14,085 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 217 transitions. Word has length 124 [2020-08-22 19:46:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:14,086 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 217 transitions. [2020-08-22 19:46:14,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 217 transitions. [2020-08-22 19:46:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 19:46:14,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:14,089 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:14,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:46:14,090 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:14,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:14,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1684557317, now seen corresponding path program 1 times [2020-08-22 19:46:14,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:14,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14118431] [2020-08-22 19:46:14,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:14,098 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:14,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:14,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 19:46:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:14,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14118431] [2020-08-22 19:46:14,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:14,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:46:14,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142963337] [2020-08-22 19:46:14,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:46:14,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:46:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:14,288 INFO L87 Difference]: Start difference. First operand 200 states and 217 transitions. Second operand 10 states. [2020-08-22 19:46:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:14,936 INFO L93 Difference]: Finished difference Result 499 states and 555 transitions. [2020-08-22 19:46:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:46:14,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 19:46:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:14,940 INFO L225 Difference]: With dead ends: 499 [2020-08-22 19:46:14,940 INFO L226 Difference]: Without dead ends: 406 [2020-08-22 19:46:14,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:46:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-08-22 19:46:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 204. [2020-08-22 19:46:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 19:46:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 221 transitions. [2020-08-22 19:46:14,965 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 221 transitions. Word has length 124 [2020-08-22 19:46:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:14,965 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 221 transitions. [2020-08-22 19:46:14,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:46:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 221 transitions. [2020-08-22 19:46:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 19:46:14,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:14,969 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:14,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:46:14,969 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:14,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1120204730, now seen corresponding path program 1 times [2020-08-22 19:46:14,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:14,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858252951] [2020-08-22 19:46:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:14,990 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:15,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:15,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 19:46:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:15,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858252951] [2020-08-22 19:46:15,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:15,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:46:15,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173642846] [2020-08-22 19:46:15,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:46:15,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:15,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:46:15,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:15,260 INFO L87 Difference]: Start difference. First operand 204 states and 221 transitions. Second operand 10 states. [2020-08-22 19:46:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:15,931 INFO L93 Difference]: Finished difference Result 450 states and 497 transitions. [2020-08-22 19:46:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:46:15,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-08-22 19:46:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:15,936 INFO L225 Difference]: With dead ends: 450 [2020-08-22 19:46:15,936 INFO L226 Difference]: Without dead ends: 346 [2020-08-22 19:46:15,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:46:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-08-22 19:46:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 214. [2020-08-22 19:46:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-08-22 19:46:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 233 transitions. [2020-08-22 19:46:15,964 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 233 transitions. Word has length 126 [2020-08-22 19:46:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:15,964 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 233 transitions. [2020-08-22 19:46:15,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:46:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 233 transitions. [2020-08-22 19:46:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-22 19:46:15,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:15,968 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:15,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:46:15,969 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2135603949, now seen corresponding path program 1 times [2020-08-22 19:46:15,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:15,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472889782] [2020-08-22 19:46:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:15,978 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:16,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:16,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-22 19:46:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:16,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472889782] [2020-08-22 19:46:16,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:16,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:46:16,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996873919] [2020-08-22 19:46:16,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:46:16,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:16,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:46:16,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:46:16,199 INFO L87 Difference]: Start difference. First operand 214 states and 233 transitions. Second operand 12 states. [2020-08-22 19:46:16,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:16,887 INFO L93 Difference]: Finished difference Result 488 states and 541 transitions. [2020-08-22 19:46:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:46:16,888 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2020-08-22 19:46:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:16,891 INFO L225 Difference]: With dead ends: 488 [2020-08-22 19:46:16,891 INFO L226 Difference]: Without dead ends: 384 [2020-08-22 19:46:16,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:46:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-08-22 19:46:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 195. [2020-08-22 19:46:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 19:46:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 211 transitions. [2020-08-22 19:46:16,909 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 211 transitions. Word has length 129 [2020-08-22 19:46:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:16,909 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 211 transitions. [2020-08-22 19:46:16,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:46:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 211 transitions. [2020-08-22 19:46:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 19:46:16,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:16,911 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:16,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:46:16,912 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:16,912 INFO L82 PathProgramCache]: Analyzing trace with hash -374659365, now seen corresponding path program 1 times [2020-08-22 19:46:16,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:16,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884970146] [2020-08-22 19:46:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:16,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:46:16,923 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:413) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:293) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) 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) [2020-08-22 19:46:16,929 INFO L168 Benchmark]: Toolchain (without parser) took 10747.93 ms. Allocated memory was 140.5 MB in the beginning and 334.0 MB in the end (delta: 193.5 MB). Free memory was 103.0 MB in the beginning and 244.1 MB in the end (delta: -141.1 MB). Peak memory consumption was 52.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:16,930 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:46:16,931 INFO L168 Benchmark]: CACSL2BoogieTranslator took 424.31 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 102.8 MB in the beginning and 181.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:16,932 INFO L168 Benchmark]: Boogie Preprocessor took 51.85 ms. Allocated memory is still 205.0 MB. Free memory was 181.2 MB in the beginning and 179.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:16,933 INFO L168 Benchmark]: RCFGBuilder took 597.44 ms. Allocated memory is still 205.0 MB. Free memory was 179.3 MB in the beginning and 144.5 MB in the end (delta: 34.9 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:16,934 INFO L168 Benchmark]: TraceAbstraction took 9668.40 ms. Allocated memory was 205.0 MB in the beginning and 334.0 MB in the end (delta: 129.0 MB). Free memory was 143.8 MB in the beginning and 244.1 MB in the end (delta: -100.3 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:16,937 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 424.31 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 102.8 MB in the beginning and 181.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.85 ms. Allocated memory is still 205.0 MB. Free memory was 181.2 MB in the beginning and 179.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 597.44 ms. Allocated memory is still 205.0 MB. Free memory was 179.3 MB in the beginning and 144.5 MB in the end (delta: 34.9 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9668.40 ms. Allocated memory was 205.0 MB in the beginning and 334.0 MB in the end (delta: 129.0 MB). Free memory was 143.8 MB in the beginning and 244.1 MB in the end (delta: -100.3 MB). Peak memory consumption was 28.7 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:413) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...