/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/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:02:35,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:02:35,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:02:35,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:02:35,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:02:35,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:02:35,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:02:35,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:02:35,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:02:35,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:02:35,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:02:35,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:02:35,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:02:35,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:02:35,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:02:35,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:02:35,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:02:35,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:02:35,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:02:35,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:02:35,160 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 22:02:35,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:02:35,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:02:35,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:02:35,175 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:02:35,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:02:35,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:02:35,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:02:35,188 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:02:35,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:02:35,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:02:35,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:02:35,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:02:35,189 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:02:35,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:02:35,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:02:35,189 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:02:35,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:02:35,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:02:35,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:02:35,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:02:35,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:02:35,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:02:35,190 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:02:35,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:02:35,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:02:35,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:02:35,617 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:02:35,618 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:02:35,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-10-23 22:02:35,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db75407bf/9fbb4c98320344468d823de4b2d941f9/FLAG0a22cb299 [2020-10-23 22:02:36,274 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:02:36,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-10-23 22:02:36,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db75407bf/9fbb4c98320344468d823de4b2d941f9/FLAG0a22cb299 [2020-10-23 22:02:36,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db75407bf/9fbb4c98320344468d823de4b2d941f9 [2020-10-23 22:02:36,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:02:36,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:02:36,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:36,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:02:36,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:02:36,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:36" (1/1) ... [2020-10-23 22:02:36,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3676d52c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:36, skipping insertion in model container [2020-10-23 22:02:36,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:02:36" (1/1) ... [2020-10-23 22:02:36,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:02:36,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:02:36,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:36,938 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:02:36,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:02:37,015 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:02:37,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37 WrapperNode [2020-10-23 22:02:37,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:02:37,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:02:37,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:02:37,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:02:37,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37" (1/1) ... [2020-10-23 22:02:37,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37" (1/1) ... [2020-10-23 22:02:37,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37" (1/1) ... [2020-10-23 22:02:37,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37" (1/1) ... [2020-10-23 22:02:37,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37" (1/1) ... [2020-10-23 22:02:37,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37" (1/1) ... [2020-10-23 22:02:37,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37" (1/1) ... [2020-10-23 22:02:37,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:02:37,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:02:37,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:02:37,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:02:37,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37" (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 22:02:37,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:02:37,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:02:37,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:02:37,209 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:02:37,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:02:37,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:02:37,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:02:37,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:02:37,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:02:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:02:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:02:37,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:02:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:02:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:02:37,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:02:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:02:37,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:02:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:02:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:02:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:02:37,707 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:02:37,707 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:02:37,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:37 BoogieIcfgContainer [2020-10-23 22:02:37,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:02:37,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:02:37,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:02:37,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:02:37,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:02:36" (1/3) ... [2020-10-23 22:02:37,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11159084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:37, skipping insertion in model container [2020-10-23 22:02:37,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:02:37" (2/3) ... [2020-10-23 22:02:37,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11159084 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:02:37, skipping insertion in model container [2020-10-23 22:02:37,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:02:37" (3/3) ... [2020-10-23 22:02:37,730 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt7.c [2020-10-23 22:02:37,743 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:02:37,748 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:02:37,761 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:02:37,784 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:02:37,784 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:02:37,785 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:02:37,785 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:02:37,785 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:02:37,785 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:02:37,785 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:02:37,785 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:02:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-10-23 22:02:37,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 22:02:37,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:37,817 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] [2020-10-23 22:02:37,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash -77608749, now seen corresponding path program 1 times [2020-10-23 22:02:37,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:37,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391538222] [2020-10-23 22:02:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:02:37,916 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:02:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:38,881 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-10-23 22:02:38,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:02:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:02:39,006 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 22:02:39,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391538222] [2020-10-23 22:02:39,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:02:39,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-23 22:02:39,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078640624] [2020-10-23 22:02:39,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 22:02:39,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:02:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 22:02:39,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-23 22:02:39,042 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 15 states. [2020-10-23 22:02:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:02:42,682 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2020-10-23 22:02:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 22:02:42,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-23 22:02:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:02:42,695 INFO L225 Difference]: With dead ends: 124 [2020-10-23 22:02:42,695 INFO L226 Difference]: Without dead ends: 78 [2020-10-23 22:02:42,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2020-10-23 22:02:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-23 22:02:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-23 22:02:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-23 22:02:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-23 22:02:42,761 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 35 [2020-10-23 22:02:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:02:42,761 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-23 22:02:42,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 22:02:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-23 22:02:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 22:02:42,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:02:42,764 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] [2020-10-23 22:02:42,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:02:42,764 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:02:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:02:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash -447719508, now seen corresponding path program 1 times [2020-10-23 22:02:42,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:02:42,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094357050] [2020-10-23 22:02:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:11,726 WARN L193 SmtUtils]: Spent 28.96 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-23 22:05:03,452 WARN L193 SmtUtils]: Spent 1.86 m on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-23 22:05:22,722 WARN L193 SmtUtils]: Spent 19.14 s on a formula simplification. DAG size of input: 12633 DAG size of output: 277 [2020-10-23 22:05:22,883 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-23 22:05:27,602 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 211 DAG size of output: 202 [2020-10-23 22:05:32,249 WARN L193 SmtUtils]: Spent 4.50 s on a formula simplification. DAG size of input: 211 DAG size of output: 211 [2020-10-23 22:05:57,104 WARN L193 SmtUtils]: Spent 24.85 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-23 22:07:40,647 WARN L193 SmtUtils]: Spent 1.73 m on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-23 22:08:11,813 WARN L193 SmtUtils]: Spent 31.08 s on a formula simplification. DAG size of input: 12634 DAG size of output: 246 [2020-10-23 22:08:11,827 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:08:11,830 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:08:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:08:12,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:08:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:08:12,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:08:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:08:12,095 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 22:08:12,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094357050] [2020-10-23 22:08:12,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:08:12,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:08:12,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978125862] [2020-10-23 22:08:12,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:08:12,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:08:12,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:08:12,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:08:12,105 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 5 states. [2020-10-23 22:08:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:08:12,661 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2020-10-23 22:08:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:08:12,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-10-23 22:08:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:08:12,664 INFO L225 Difference]: With dead ends: 95 [2020-10-23 22:08:12,665 INFO L226 Difference]: Without dead ends: 72 [2020-10-23 22:08:12,667 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 22:08:12,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-23 22:08:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-10-23 22:08:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-23 22:08:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-23 22:08:12,691 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2020-10-23 22:08:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:08:12,692 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-23 22:08:12,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:08:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-23 22:08:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 22:08:12,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:08:12,694 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] [2020-10-23 22:08:12,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:08:12,695 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:08:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:08:12,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1452038179, now seen corresponding path program 1 times [2020-10-23 22:08:12,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:08:12,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6539428] [2020-10-23 22:08:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:08:41,708 WARN L193 SmtUtils]: Spent 29.01 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-23 22:10:33,515 WARN L193 SmtUtils]: Spent 1.86 m on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-23 22:14:00,689 WARN L193 SmtUtils]: Spent 3.45 m on a formula simplification. DAG size of input: 44889 DAG size of output: 275 [2020-10-23 22:14:01,012 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-23 22:14:14,207 WARN L193 SmtUtils]: Spent 13.18 s on a formula simplification. DAG size of input: 3294 DAG size of output: 226 [2020-10-23 22:14:37,047 WARN L193 SmtUtils]: Spent 22.83 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-23 22:15:47,525 WARN L193 SmtUtils]: Spent 1.17 m on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-23 22:15:54,344 WARN L193 SmtUtils]: Spent 6.81 s on a formula simplification. DAG size of input: 542 DAG size of output: 246 [2020-10-23 22:15:54,348 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:15:54,350 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:15:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:54,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:15:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:54,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:15:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:15:54,547 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 22:15:54,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6539428] [2020-10-23 22:15:54,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:15:54,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 22:15:54,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585978502] [2020-10-23 22:15:54,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 22:15:54,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:15:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 22:15:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:15:54,550 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 5 states. [2020-10-23 22:15:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:15:57,057 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-23 22:15:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 22:15:57,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-23 22:15:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:15:57,059 INFO L225 Difference]: With dead ends: 85 [2020-10-23 22:15:57,059 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 22:15:57,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:15:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 22:15:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-23 22:15:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 22:15:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-23 22:15:57,083 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 45 [2020-10-23 22:15:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:15:57,084 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-23 22:15:57,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 22:15:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-23 22:15:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 22:15:57,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:15:57,086 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] [2020-10-23 22:15:57,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:15:57,086 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:15:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:15:57,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1245039122, now seen corresponding path program 1 times [2020-10-23 22:15:57,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:15:57,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047982572] [2020-10-23 22:15:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:16:26,131 WARN L193 SmtUtils]: Spent 29.04 s on a formula simplification that was a NOOP. DAG size: 37