/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:03:03,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:03:03,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:03:03,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:03:03,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:03:03,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:03:03,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:03:03,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:03:03,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:03:03,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:03:03,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:03:03,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:03:03,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:03:03,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:03:03,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:03:03,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:03:03,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:03:03,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:03:03,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:03:03,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:03:03,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:03:03,504 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:03:03,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:03:03,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:03:03,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:03:03,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:03:03,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:03:03,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:03:03,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:03:03,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:03:03,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:03:03,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:03:03,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:03:03,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:03:03,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:03:03,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:03:03,513 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:03:03,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:03:03,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:03:03,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:03:03,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:03:03,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:03:03,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:03:03,514 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:03:03,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:03:03,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:03:03,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:03:03,951 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:03:03,952 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:03:03,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-10-23 22:03:04,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e901d92/8a2fd36cab774cb8ac3c469058170283/FLAG59316dc24 [2020-10-23 22:03:04,635 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:03:04,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-10-23 22:03:04,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e901d92/8a2fd36cab774cb8ac3c469058170283/FLAG59316dc24 [2020-10-23 22:03:05,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27e901d92/8a2fd36cab774cb8ac3c469058170283 [2020-10-23 22:03:05,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:03:05,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:03:05,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:03:05,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:03:05,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:03:05,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:03:05" (1/1) ... [2020-10-23 22:03:05,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@606cba56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05, skipping insertion in model container [2020-10-23 22:03:05,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:03:05" (1/1) ... [2020-10-23 22:03:05,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:03:05,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:03:05,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:03:05,315 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:03:05,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:03:05,360 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:03:05,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05 WrapperNode [2020-10-23 22:03:05,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:03:05,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:03:05,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:03:05,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:03:05,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05" (1/1) ... [2020-10-23 22:03:05,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05" (1/1) ... [2020-10-23 22:03:05,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05" (1/1) ... [2020-10-23 22:03:05,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05" (1/1) ... [2020-10-23 22:03:05,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05" (1/1) ... [2020-10-23 22:03:05,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05" (1/1) ... [2020-10-23 22:03:05,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05" (1/1) ... [2020-10-23 22:03:05,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:03:05,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:03:05,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:03:05,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:03:05,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05" (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 [2020-10-23 22:03:05,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:03:05,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:03:05,494 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:03:05,494 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:03:05,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:03:05,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:03:05,494 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:03:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:03:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:03:05,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:03:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:03:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:03:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:03:05,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:03:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:03:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:03:05,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:03:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:03:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:03:05,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:03:06,081 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:03:06,082 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:03:06,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:03:06 BoogieIcfgContainer [2020-10-23 22:03:06,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:03:06,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:03:06,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:03:06,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:03:06,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:03:05" (1/3) ... [2020-10-23 22:03:06,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7a5abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:03:06, skipping insertion in model container [2020-10-23 22:03:06,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:05" (2/3) ... [2020-10-23 22:03:06,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a7a5abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:03:06, skipping insertion in model container [2020-10-23 22:03:06,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:03:06" (3/3) ... [2020-10-23 22:03:06,096 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-10-23 22:03:06,109 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:03:06,115 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:03:06,129 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:03:06,167 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:03:06,167 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:03:06,167 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:03:06,167 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:03:06,167 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:03:06,167 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:03:06,168 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:03:06,168 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:03:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-10-23 22:03:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 22:03:06,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:06,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:03:06,201 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:06,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1798983212, now seen corresponding path program 1 times [2020-10-23 22:03:06,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:06,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205520934] [2020-10-23 22:03:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:06,283 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:07,401 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-23 22:03:07,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:07,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205520934] [2020-10-23 22:03:07,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:07,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-23 22:03:07,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606537254] [2020-10-23 22:03:07,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 22:03:07,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 22:03:07,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-23 22:03:07,652 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 17 states. [2020-10-23 22:03:08,666 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 22:03:08,810 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-23 22:03:09,217 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-23 22:03:10,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:10,415 INFO L93 Difference]: Finished difference Result 198 states and 272 transitions. [2020-10-23 22:03:10,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 22:03:10,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-23 22:03:10,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:10,430 INFO L225 Difference]: With dead ends: 198 [2020-10-23 22:03:10,430 INFO L226 Difference]: Without dead ends: 142 [2020-10-23 22:03:10,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2020-10-23 22:03:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-23 22:03:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 64. [2020-10-23 22:03:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-23 22:03:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-23 22:03:10,509 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 37 [2020-10-23 22:03:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:10,510 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-23 22:03:10,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 22:03:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-23 22:03:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 22:03:10,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:10,512 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 22:03:10,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:03:10,513 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1332374799, now seen corresponding path program 1 times [2020-10-23 22:03:10,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:10,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85581318] [2020-10-23 22:03:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:39,554 WARN L193 SmtUtils]: Spent 29.03 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-23 22:05:31,384 WARN L193 SmtUtils]: Spent 1.86 m on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-23 22:06:42,265 WARN L193 SmtUtils]: Spent 1.17 m on a formula simplification. DAG size of input: 44891 DAG size of output: 302 [2020-10-23 22:06:48,833 WARN L193 SmtUtils]: Spent 6.42 s on a formula simplification. DAG size of input: 213 DAG size of output: 213 [2020-10-23 22:06:49,036 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-23 22:07:12,965 WARN L193 SmtUtils]: Spent 23.86 s on a formula simplification. DAG size of input: 11345 DAG size of output: 213 [2020-10-23 22:07:39,908 WARN L193 SmtUtils]: Spent 26.94 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-23 22:09:25,644 WARN L193 SmtUtils]: Spent 1.76 m on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-23 22:09:52,484 WARN L193 SmtUtils]: Spent 26.79 s on a formula simplification. DAG size of input: 4572 DAG size of output: 247 [2020-10-23 22:09:52,502 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:09:52,504 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:09:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:52,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:09:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:52,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 22:09:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:09:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:09:52,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85581318] [2020-10-23 22:09:52,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:09:52,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:09:52,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574980201] [2020-10-23 22:09:52,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:09:52,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:09:52,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:09:52,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:09:52,862 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 5 states. [2020-10-23 22:09:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:09:53,592 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2020-10-23 22:09:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:09:53,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-23 22:09:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:09:53,599 INFO L225 Difference]: With dead ends: 109 [2020-10-23 22:09:53,599 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 22:09:53,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:09:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 22:09:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2020-10-23 22:09:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 22:09:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-23 22:09:53,632 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 46 [2020-10-23 22:09:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:09:53,633 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-23 22:09:53,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:09:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-23 22:09:53,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 22:09:53,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:09:53,635 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 22:09:53,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:09:53,636 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:09:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:09:53,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2032386084, now seen corresponding path program 1 times [2020-10-23 22:09:53,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:09:53,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128144233] [2020-10-23 22:09:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:10:22,679 WARN L193 SmtUtils]: Spent 29.04 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-23 22:11:14,578 WARN L193 SmtUtils]: Spent 51.90 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-23 22:11:23,874 WARN L193 SmtUtils]: Spent 9.28 s on a formula simplification. DAG size of input: 543 DAG size of output: 251 [2020-10-23 22:11:26,125 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-23 22:11:34,178 WARN L193 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 220 DAG size of output: 220 [2020-10-23 22:11:59,055 WARN L193 SmtUtils]: Spent 24.87 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-23 22:13:40,687 WARN L193 SmtUtils]: Spent 1.69 m on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-23 22:13:52,732 WARN L193 SmtUtils]: Spent 12.04 s on a formula simplification. DAG size of input: 544 DAG size of output: 305 [2020-10-23 22:13:52,738 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:13:52,740 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:13:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:13:52,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:13:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:13:52,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 22:13:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:13:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:13:52,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128144233] [2020-10-23 22:13:52,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:13:52,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:13:53,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667034375] [2020-10-23 22:13:53,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:13:53,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:13:53,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:13:53,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:13:53,004 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 5 states. [2020-10-23 22:13:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:13:53,606 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2020-10-23 22:13:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:13:53,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-23 22:13:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:13:53,610 INFO L225 Difference]: With dead ends: 108 [2020-10-23 22:13:53,611 INFO L226 Difference]: Without dead ends: 81 [2020-10-23 22:13:53,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:13:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-23 22:13:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-10-23 22:13:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 22:13:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-23 22:13:53,651 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 47 [2020-10-23 22:13:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:13:53,651 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-23 22:13:53,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:13:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-23 22:13:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 22:13:53,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:13:53,658 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 22:13:53,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:13:53,658 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:13:53,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:13:53,664 INFO L82 PathProgramCache]: Analyzing trace with hash -4154153, now seen corresponding path program 1 times [2020-10-23 22:13:53,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:13:53,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760142281] [2020-10-23 22:13:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:14:22,745 WARN L193 SmtUtils]: Spent 29.08 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-23 22:16:14,728 WARN L193 SmtUtils]: Spent 1.87 m on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-23 22:16:49,656 WARN L193 SmtUtils]: Spent 34.88 s on a formula simplification. DAG size of input: 12635 DAG size of output: 252 [2020-10-23 22:16:51,825 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 47 [2020-10-23 22:16:56,635 WARN L193 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 51 DAG size of output: 45