/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/loop-acceleration/phases_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:59:13,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:59:13,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:59:13,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:59:13,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:59:13,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:59:13,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:59:13,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:59:13,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:59:13,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:59:13,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:59:13,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:59:13,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:59:13,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:59:13,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:59:13,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:59:13,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:59:13,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:59:13,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:59:13,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:59:13,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:59:13,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:59:13,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:59:13,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:59:13,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 01:59:13,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 01:59:13,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 01:59:13,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 01:59:13,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 01:59:13,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 01:59:13,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 01:59:13,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 01:59:13,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 01:59:13,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 01:59:13,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 01:59:13,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 01:59:13,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 01:59:13,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 01:59:13,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:59:13,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:59:13,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:59:13,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:59:13,400 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:59:13,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:59:13,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:59:13,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:59:13,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:59:13,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:59:13,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:59:13,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:59:13,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:59:13,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:59:13,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:59:13,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:59:13,414 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:59:13,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:59:13,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:59:13,415 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:59:13,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:59:13,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:59:13,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:59:13,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:59:13,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:59:13,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:59:13,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:59:13,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:59:14,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:59:14,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:59:14,052 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:59:14,053 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:59:14,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-11-07 01:59:14,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d34cbd05/db36669d651549e096c602cf50176822/FLAGcd7691427 [2020-11-07 01:59:14,902 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:59:14,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-11-07 01:59:14,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d34cbd05/db36669d651549e096c602cf50176822/FLAGcd7691427 [2020-11-07 01:59:15,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d34cbd05/db36669d651549e096c602cf50176822 [2020-11-07 01:59:15,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:59:15,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:59:15,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:59:15,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:59:15,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:59:15,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:59:15" (1/1) ... [2020-11-07 01:59:15,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b70f826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15, skipping insertion in model container [2020-11-07 01:59:15,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:59:15" (1/1) ... [2020-11-07 01:59:15,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:59:15,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:59:15,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:59:15,718 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:59:15,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:59:15,762 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:59:15,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15 WrapperNode [2020-11-07 01:59:15,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:59:15,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:59:15,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:59:15,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:59:15,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15" (1/1) ... [2020-11-07 01:59:15,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15" (1/1) ... [2020-11-07 01:59:15,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15" (1/1) ... [2020-11-07 01:59:15,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15" (1/1) ... [2020-11-07 01:59:15,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15" (1/1) ... [2020-11-07 01:59:15,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15" (1/1) ... [2020-11-07 01:59:15,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15" (1/1) ... [2020-11-07 01:59:15,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:59:15,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:59:15,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:59:15,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:59:15,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15" (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 [2020-11-07 01:59:15,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:59:15,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:59:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:59:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 01:59:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:59:15,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:59:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:59:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:59:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:59:15,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:59:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 01:59:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 01:59:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:59:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:59:15,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:59:15,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:59:15,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:59:15,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:59:15,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:59:15,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:59:16,382 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:59:16,383 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 01:59:16,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:59:16 BoogieIcfgContainer [2020-11-07 01:59:16,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:59:16,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:59:16,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:59:16,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:59:16,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:59:15" (1/3) ... [2020-11-07 01:59:16,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4178add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:59:16, skipping insertion in model container [2020-11-07 01:59:16,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:15" (2/3) ... [2020-11-07 01:59:16,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4178add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:59:16, skipping insertion in model container [2020-11-07 01:59:16,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:59:16" (3/3) ... [2020-11-07 01:59:16,430 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2020-11-07 01:59:16,456 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:59:16,462 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:59:16,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:59:16,515 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:59:16,515 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:59:16,515 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:59:16,515 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:59:16,515 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:59:16,516 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:59:16,516 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:59:16,516 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:59:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-07 01:59:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-07 01:59:16,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:16,576 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] [2020-11-07 01:59:16,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash 153821576, now seen corresponding path program 1 times [2020-11-07 01:59:16,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:16,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070585692] [2020-11-07 01:59:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:16,715 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:16,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:16,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070585692] [2020-11-07 01:59:16,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:16,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:59:16,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424596729] [2020-11-07 01:59:17,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:59:17,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:17,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:59:17,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:59:17,034 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-11-07 01:59:17,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:17,177 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-11-07 01:59:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:59:17,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-11-07 01:59:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:17,193 INFO L225 Difference]: With dead ends: 50 [2020-11-07 01:59:17,193 INFO L226 Difference]: Without dead ends: 28 [2020-11-07 01:59:17,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:59:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-07 01:59:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-07 01:59:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-07 01:59:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-07 01:59:17,259 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2020-11-07 01:59:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:17,260 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-07 01:59:17,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:59:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-07 01:59:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-07 01:59:17,262 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:17,262 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] [2020-11-07 01:59:17,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:59:17,263 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash -246986538, now seen corresponding path program 1 times [2020-11-07 01:59:17,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:17,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98590116] [2020-11-07 01:59:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:17,270 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:17,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:17,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98590116] [2020-11-07 01:59:17,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:17,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 01:59:17,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105787934] [2020-11-07 01:59:17,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 01:59:17,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:17,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 01:59:17,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-07 01:59:17,619 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-11-07 01:59:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:18,077 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-11-07 01:59:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 01:59:18,078 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-07 01:59:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:18,080 INFO L225 Difference]: With dead ends: 39 [2020-11-07 01:59:18,080 INFO L226 Difference]: Without dead ends: 33 [2020-11-07 01:59:18,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-07 01:59:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-07 01:59:18,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-11-07 01:59:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-07 01:59:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-11-07 01:59:18,098 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-11-07 01:59:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:18,099 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-11-07 01:59:18,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 01:59:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-11-07 01:59:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-07 01:59:18,100 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:18,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:18,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:59:18,101 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:18,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:18,103 INFO L82 PathProgramCache]: Analyzing trace with hash -93018322, now seen corresponding path program 1 times [2020-11-07 01:59:18,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:18,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032003652] [2020-11-07 01:59:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY