/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:23:27,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:23:27,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:23:27,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:23:27,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:23:27,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:23:27,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:23:27,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:23:27,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:23:27,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:23:27,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:23:27,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:23:27,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:23:27,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:23:27,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:23:27,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:23:27,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:23:27,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:23:27,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:23:27,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:23:27,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:23:27,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:23:27,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:23:27,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:23:27,201 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:23:27,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:23:27,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:23:27,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:23:27,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:23:27,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:23:27,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:23:27,202 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:23:27,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:23:27,202 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:23:27,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:23:27,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:23:27,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:23:27,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:23:27,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:23:27,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:23:27,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:23:27,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:23:27,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:23:27,203 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:23:27,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:23:27,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:23:27,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:23:27,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:23:27,437 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:23:27,437 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:23:27,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2021-05-06 12:23:27,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18c678cd3/4932f118b8b84ffaa5e7dfc1398511f3/FLAGfd6893b03 [2021-05-06 12:23:27,837 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:23:27,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2021-05-06 12:23:27,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18c678cd3/4932f118b8b84ffaa5e7dfc1398511f3/FLAGfd6893b03 [2021-05-06 12:23:27,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18c678cd3/4932f118b8b84ffaa5e7dfc1398511f3 [2021-05-06 12:23:27,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:23:27,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:23:27,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:23:27,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:23:27,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:23:27,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:23:27" (1/1) ... [2021-05-06 12:23:27,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71da04e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:27, skipping insertion in model container [2021-05-06 12:23:27,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:23:27" (1/1) ... [2021-05-06 12:23:27,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:23:27,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:23:27,955 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c[533,546] [2021-05-06 12:23:27,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:23:27,988 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:23:28,006 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c[533,546] [2021-05-06 12:23:28,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:23:28,040 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:23:28,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28 WrapperNode [2021-05-06 12:23:28,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:23:28,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:23:28,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:23:28,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:23:28,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28" (1/1) ... [2021-05-06 12:23:28,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28" (1/1) ... [2021-05-06 12:23:28,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28" (1/1) ... [2021-05-06 12:23:28,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28" (1/1) ... [2021-05-06 12:23:28,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28" (1/1) ... [2021-05-06 12:23:28,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28" (1/1) ... [2021-05-06 12:23:28,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28" (1/1) ... [2021-05-06 12:23:28,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:23:28,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:23:28,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:23:28,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:23:28,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28" (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 [2021-05-06 12:23:28,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:23:28,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:23:28,126 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:23:28,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:23:28,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:23:28,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:23:28,126 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:23:28,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:23:28,127 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:23:28,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:23:28,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 12:23:28,127 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:23:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:23:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:23:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:23:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:23:28,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:23:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:23:28,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:23:28,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:23:28,384 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:23:28,384 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 12:23:28,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:23:28 BoogieIcfgContainer [2021-05-06 12:23:28,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:23:28,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:23:28,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:23:28,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:23:28,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:23:27" (1/3) ... [2021-05-06 12:23:28,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdc0de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:23:28, skipping insertion in model container [2021-05-06 12:23:28,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:28" (2/3) ... [2021-05-06 12:23:28,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdc0de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:23:28, skipping insertion in model container [2021-05-06 12:23:28,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:23:28" (3/3) ... [2021-05-06 12:23:28,390 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.c [2021-05-06 12:23:28,410 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:23:28,413 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:23:28,423 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:23:28,452 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:23:28,452 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:23:28,452 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:23:28,452 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:23:28,452 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:23:28,452 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:23:28,452 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:23:28,452 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:23:28,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 12:23:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 12:23:28,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:23:28,485 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:23:28,485 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:23:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:23:28,488 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-05-06 12:23:28,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:23:28,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084719337] [2021-05-06 12:23:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:23:28,548 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:23:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:28,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:23:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:28,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:23:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:28,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:23:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 12:23:28,671 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:23:28,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084719337] [2021-05-06 12:23:28,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1084719337] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:23:28,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:23:28,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:23:28,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068035761] [2021-05-06 12:23:28,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:23:28,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:23:28,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:23:28,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:23:28,684 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 12:23:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:23:32,585 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-05-06 12:23:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:23:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 12:23:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:23:32,591 INFO L225 Difference]: With dead ends: 69 [2021-05-06 12:23:32,591 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 12:23:32,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:23:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 12:23:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 12:23:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 12:23:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-06 12:23:32,637 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-06 12:23:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:23:32,637 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-06 12:23:32,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 12:23:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-06 12:23:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 12:23:32,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:23:32,639 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:23:32,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:23:32,639 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:23:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:23:32,639 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-05-06 12:23:32,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:23:32,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188378582] [2021-05-06 12:23:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:23:32,641 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:23:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:32,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:23:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:32,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:23:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:32,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:23:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 12:23:32,884 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:23:32,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188378582] [2021-05-06 12:23:32,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [188378582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:23:32,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:23:32,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 12:23:32,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741868700] [2021-05-06 12:23:32,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 12:23:32,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:23:32,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 12:23:32,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 12:23:32,886 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 12:24:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:24:17,486 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2021-05-06 12:24:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 12:24:17,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-06 12:24:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:24:17,488 INFO L225 Difference]: With dead ends: 68 [2021-05-06 12:24:17,488 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 12:24:17,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-06 12:24:17,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 12:24:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-05-06 12:24:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 12:24:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-05-06 12:24:17,503 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 24 [2021-05-06 12:24:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:24:17,503 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-05-06 12:24:17,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 12:24:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-05-06 12:24:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 12:24:17,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:24:17,504 INFO L523 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] [2021-05-06 12:24:17,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:24:17,505 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:24:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:24:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-05-06 12:24:17,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:24:17,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464019676] [2021-05-06 12:24:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:24:17,507 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:24:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:24:17,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:24:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:24:17,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:24:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:24:17,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:24:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:24:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 12:24:17,780 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:24:17,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464019676] [2021-05-06 12:24:17,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1464019676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:24:17,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:24:17,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 12:24:17,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863411686] [2021-05-06 12:24:17,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 12:24:17,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:24:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 12:24:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 12:24:17,782 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)