/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/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:44:42,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:44:42,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:44:42,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:44:42,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:44:42,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:44:42,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:44:42,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:44:42,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:44:42,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:44:42,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:44:42,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:44:42,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:44:42,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:44:42,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:44:42,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:44:42,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:44:42,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:44:42,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:44:42,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:44:42,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:44:42,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:44:42,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:44:42,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:44:42,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:44:42,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 21:44:42,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 21:44:42,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 21:44:42,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 21:44:42,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 21:44:42,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 21:44:42,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 21:44:42,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 21:44:42,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:44:42,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:44:42,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:44:42,775 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 21:44:42,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:44:42,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:44:42,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:44:42,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:44:42,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:44:42,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:44:42,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:44:42,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:44:42,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:44:42,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:44:42,804 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:44:42,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:44:42,805 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:44:42,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:44:42,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:44:42,806 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:44:42,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:44:42,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:44:42,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:44:42,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:44:42,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:44:42,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:44:42,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:44:43,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:44:43,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:44:43,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:44:43,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:44:43,302 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:44:43,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-10-23 21:44:43,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9c6dfa8/24d88917b8b84bb08e2072f26c247a8e/FLAG415d547fd [2020-10-23 21:44:44,094 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:44:44,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs2f.c [2020-10-23 21:44:44,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9c6dfa8/24d88917b8b84bb08e2072f26c247a8e/FLAG415d547fd [2020-10-23 21:44:44,432 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9c6dfa8/24d88917b8b84bb08e2072f26c247a8e [2020-10-23 21:44:44,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:44:44,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:44:44,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:44,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:44:44,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:44:44,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47293faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44, skipping insertion in model container [2020-10-23 21:44:44,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:44:44,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:44:44,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:44,677 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:44:44,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:44:44,715 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:44:44,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44 WrapperNode [2020-10-23 21:44:44,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:44:44,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:44:44,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:44:44,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:44:44,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (1/1) ... [2020-10-23 21:44:44,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:44:44,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:44:44,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:44:44,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:44:44,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (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 21:44:44,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:44:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:44:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:44:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 21:44:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:44:44,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:44:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:44:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:44:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:44:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:44:44,838 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 21:44:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:44:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:44:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 21:44:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:44:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 21:44:44,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:44:44,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:44:44,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:44:44,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:44:44,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:44:44,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:44:45,370 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:44:45,371 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 21:44:45,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:45 BoogieIcfgContainer [2020-10-23 21:44:45,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:44:45,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:44:45,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:44:45,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:44:45,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:44:44" (1/3) ... [2020-10-23 21:44:45,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7caad9a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:45, skipping insertion in model container [2020-10-23 21:44:45,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:44:44" (2/3) ... [2020-10-23 21:44:45,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7caad9a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:44:45, skipping insertion in model container [2020-10-23 21:44:45,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:44:45" (3/3) ... [2020-10-23 21:44:45,383 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-10-23 21:44:45,398 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:44:45,404 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:44:45,419 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:44:45,461 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:44:45,461 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:44:45,461 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:44:45,461 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:44:45,461 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:44:45,461 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:44:45,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:44:45,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:44:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-23 21:44:45,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 21:44:45,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:45,513 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] [2020-10-23 21:44:45,514 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash -341341850, now seen corresponding path program 1 times [2020-10-23 21:44:45,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:45,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623406815] [2020-10-23 21:44:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:45,643 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:45,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:45,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:45,940 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 21:44:45,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623406815] [2020-10-23 21:44:45,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:45,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:44:45,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566791271] [2020-10-23 21:44:45,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:44:45,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:45,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:44:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:44:45,976 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-10-23 21:44:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:46,242 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-23 21:44:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:44:46,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-10-23 21:44:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:46,262 INFO L225 Difference]: With dead ends: 111 [2020-10-23 21:44:46,262 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 21:44:46,271 INFO L677 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 [2020-10-23 21:44:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 21:44:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 21:44:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 21:44:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-23 21:44:46,361 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2020-10-23 21:44:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:46,364 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-23 21:44:46,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:44:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-23 21:44:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 21:44:46,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:46,367 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] [2020-10-23 21:44:46,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:44:46,368 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:46,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1000671319, now seen corresponding path program 1 times [2020-10-23 21:44:46,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:46,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281468047] [2020-10-23 21:44:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:46,383 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:46,554 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 21:44:46,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281468047] [2020-10-23 21:44:46,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:46,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 21:44:46,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85236856] [2020-10-23 21:44:46,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 21:44:46,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:46,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 21:44:46,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:44:46,559 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 5 states. [2020-10-23 21:44:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:46,834 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-23 21:44:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 21:44:46,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-23 21:44:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:46,837 INFO L225 Difference]: With dead ends: 88 [2020-10-23 21:44:46,837 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 21:44:46,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:44:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 21:44:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-10-23 21:44:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 21:44:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-23 21:44:46,852 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 36 [2020-10-23 21:44:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:46,853 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-23 21:44:46,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 21:44:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-23 21:44:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 21:44:46,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:46,855 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] [2020-10-23 21:44:46,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:44:46,856 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:46,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:46,856 INFO L82 PathProgramCache]: Analyzing trace with hash -546938271, now seen corresponding path program 1 times [2020-10-23 21:44:46,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:46,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752002208] [2020-10-23 21:44:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:46,987 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:46,989 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:47,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:47,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:47,194 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 21:44:47,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752002208] [2020-10-23 21:44:47,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:47,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:44:47,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397672024] [2020-10-23 21:44:47,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:44:47,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:44:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:44:47,202 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 8 states. [2020-10-23 21:44:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:47,555 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-23 21:44:47,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:44:47,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-23 21:44:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:47,557 INFO L225 Difference]: With dead ends: 73 [2020-10-23 21:44:47,557 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 21:44:47,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-23 21:44:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 21:44:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-23 21:44:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 21:44:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-23 21:44:47,572 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 48 [2020-10-23 21:44:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:47,572 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-23 21:44:47,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:44:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-23 21:44:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-23 21:44:47,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:47,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:44:47,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:44:47,575 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:47,576 INFO L82 PathProgramCache]: Analyzing trace with hash -20855722, now seen corresponding path program 1 times [2020-10-23 21:44:47,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:47,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717174058] [2020-10-23 21:44:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:47,819 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:47,821 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:48,020 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 21:44:48,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717174058] [2020-10-23 21:44:48,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:48,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:44:48,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867932902] [2020-10-23 21:44:48,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:44:48,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:44:48,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:44:48,023 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 10 states. [2020-10-23 21:44:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:48,450 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-10-23 21:44:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 21:44:48,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-23 21:44:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:48,452 INFO L225 Difference]: With dead ends: 101 [2020-10-23 21:44:48,452 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 21:44:48,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-23 21:44:48,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 21:44:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-10-23 21:44:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 21:44:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-23 21:44:48,466 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-10-23 21:44:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:48,466 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-23 21:44:48,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:44:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-23 21:44:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 21:44:48,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:48,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2020-10-23 21:44:48,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:44:48,469 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:48,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:48,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1036949453, now seen corresponding path program 2 times [2020-10-23 21:44:48,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:48,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427144662] [2020-10-23 21:44:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:49,195 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:44:49,197 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:44:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:49,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:44:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:49,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 21:44:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:44:49,358 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 21:44:49,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427144662] [2020-10-23 21:44:49,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:44:49,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 21:44:49,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449510684] [2020-10-23 21:44:49,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 21:44:49,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:44:49,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 21:44:49,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 21:44:49,361 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 6 states. [2020-10-23 21:44:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:44:49,602 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-10-23 21:44:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 21:44:49,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-23 21:44:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:44:49,604 INFO L225 Difference]: With dead ends: 101 [2020-10-23 21:44:49,604 INFO L226 Difference]: Without dead ends: 69 [2020-10-23 21:44:49,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:44:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-23 21:44:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-23 21:44:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 21:44:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-23 21:44:49,620 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-10-23 21:44:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:44:49,620 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-23 21:44:49,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 21:44:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-23 21:44:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 21:44:49,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:44:49,622 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-10-23 21:44:49,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 21:44:49,622 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:44:49,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:44:49,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1144764371, now seen corresponding path program 1 times [2020-10-23 21:44:49,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:44:49,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451342873] [2020-10-23 21:44:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:44:50,293 ERROR L275 FreeRefinementEngine]: Caught unknown exception: No quantified variables given [2020-10-23 21:44:50,294 WARN L340 FreeRefinementEngine]: Global settings require throwing the following exception [2020-10-23 21:44:50,295 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: No quantified variables given at de.uni_freiburg.informatik.ultimate.logic.NoopScript.quantifier(NoopScript.java:505) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.quantifier(WrapperScript.java:266) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.quantifier(WrapperScript.java:266) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.checkForAll(FastUPRCore.java:370) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.periodLoop(FastUPRCore.java:179) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.prefixLoop(FastUPRCore.java:154) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.fastupr.FastUPRCore.(FastUPRCore.java:145) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.fastUprAcceleration(Accelerator.java:109) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.Accelerator.accelerateLoop(Accelerator.java:89) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:285) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) 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:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-23 21:44:50,301 INFO L168 Benchmark]: Toolchain (without parser) took 5862.79 ms. Allocated memory was 152.0 MB in the beginning and 184.5 MB in the end (delta: 32.5 MB). Free memory was 128.9 MB in the beginning and 162.1 MB in the end (delta: -33.2 MB). Peak memory consumption was 39.7 kB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,302 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 126.6 MB in the end (delta: 120.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:44:50,303 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.09 ms. Allocated memory is still 152.0 MB. Free memory was 128.2 MB in the beginning and 118.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,304 INFO L168 Benchmark]: Boogie Preprocessor took 42.57 ms. Allocated memory is still 152.0 MB. Free memory was 118.5 MB in the beginning and 116.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,305 INFO L168 Benchmark]: RCFGBuilder took 612.30 ms. Allocated memory is still 152.0 MB. Free memory was 116.8 MB in the beginning and 130.6 MB in the end (delta: -13.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,306 INFO L168 Benchmark]: TraceAbstraction took 4923.74 ms. Allocated memory was 152.0 MB in the beginning and 184.5 MB in the end (delta: 32.5 MB). Free memory was 130.6 MB in the beginning and 162.1 MB in the end (delta: -31.5 MB). Peak memory consumption was 1.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:44:50,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory was 126.7 MB in the beginning and 126.6 MB in the end (delta: 120.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.09 ms. Allocated memory is still 152.0 MB. Free memory was 128.2 MB in the beginning and 118.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.57 ms. Allocated memory is still 152.0 MB. Free memory was 118.5 MB in the beginning and 116.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 612.30 ms. Allocated memory is still 152.0 MB. Free memory was 116.8 MB in the beginning and 130.6 MB in the end (delta: -13.8 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4923.74 ms. Allocated memory was 152.0 MB in the beginning and 184.5 MB in the end (delta: 32.5 MB). Free memory was 130.6 MB in the beginning and 162.1 MB in the end (delta: -31.5 MB). Peak memory consumption was 1.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: No quantified variables given de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: No quantified variables given: de.uni_freiburg.informatik.ultimate.logic.NoopScript.quantifier(NoopScript.java:505) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...