/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/divbin_valuebound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:42:42,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:42:42,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:42:42,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:42:43,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:42:43,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:42:43,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:42:43,022 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:42:43,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:42:43,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:42:43,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:42:43,046 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:42:43,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:42:43,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:42:43,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:42:43,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:42:43,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:42:43,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:42:43,048 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:42:43,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:42:43,048 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:42:43,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:42:43,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:42:43,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:42:43,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:42:43,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:42:43,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:42:43,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:42:43,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:42:43,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:42:43,050 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:42:43,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:42:43,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:42:43,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:42:43,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:42:43,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:42:43,428 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:42:43,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound50.i [2021-05-03 00:42:43,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c76cfb189/162a6de810864d42a8fcc131403add30/FLAG8a0df7b2c [2021-05-03 00:42:43,990 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:42:43,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound50.i [2021-05-03 00:42:44,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c76cfb189/162a6de810864d42a8fcc131403add30/FLAG8a0df7b2c [2021-05-03 00:42:44,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c76cfb189/162a6de810864d42a8fcc131403add30 [2021-05-03 00:42:44,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:42:44,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:42:44,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:42:44,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:42:44,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:42:44,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:42:44" (1/1) ... [2021-05-03 00:42:44,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bfe2cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44, skipping insertion in model container [2021-05-03 00:42:44,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:42:44" (1/1) ... [2021-05-03 00:42:44,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:42:44,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:42:44,613 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/divbin_valuebound50.i[958,971] [2021-05-03 00:42:44,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:42:44,664 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:42:44,688 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/divbin_valuebound50.i[958,971] [2021-05-03 00:42:44,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:42:44,730 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:42:44,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44 WrapperNode [2021-05-03 00:42:44,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:42:44,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:42:44,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:42:44,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:42:44,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44" (1/1) ... [2021-05-03 00:42:44,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44" (1/1) ... [2021-05-03 00:42:44,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44" (1/1) ... [2021-05-03 00:42:44,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44" (1/1) ... [2021-05-03 00:42:44,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44" (1/1) ... [2021-05-03 00:42:44,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44" (1/1) ... [2021-05-03 00:42:44,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44" (1/1) ... [2021-05-03 00:42:44,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:42:44,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:42:44,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:42:44,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:42:44,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44" (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 [2021-05-03 00:42:44,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:42:44,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:42:44,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:42:44,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:42:44,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:42:44,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:42:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:42:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:42:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-03 00:42:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-03 00:42:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:42:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:42:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-03 00:42:44,868 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:42:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:42:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:42:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:42:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:42:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:42:44,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:42:44,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:42:44,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:42:45,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:42:45,229 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 00:42:45,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:42:45 BoogieIcfgContainer [2021-05-03 00:42:45,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:42:45,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:42:45,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:42:45,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:42:45,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:42:44" (1/3) ... [2021-05-03 00:42:45,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2302f330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:42:45, skipping insertion in model container [2021-05-03 00:42:45,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:44" (2/3) ... [2021-05-03 00:42:45,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2302f330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:42:45, skipping insertion in model container [2021-05-03 00:42:45,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:42:45" (3/3) ... [2021-05-03 00:42:45,242 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound50.i [2021-05-03 00:42:45,248 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:42:45,252 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:42:45,272 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:42:45,289 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:42:45,290 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:42:45,290 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:42:45,290 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:42:45,291 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:42:45,292 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:42:45,292 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:42:45,292 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:42:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-03 00:42:45,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 00:42:45,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:45,318 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:45,318 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2021-05-03 00:42:45,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:45,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216749771] [2021-05-03 00:42:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:45,395 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:45,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:42:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:45,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:42:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:45,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-03 00:42:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:45,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:42:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:45,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-03 00:42:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-03 00:42:45,643 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:42:45,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216749771] [2021-05-03 00:42:45,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216749771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:42:45,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:42:45,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:42:45,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152100299] [2021-05-03 00:42:45,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:42:45,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:42:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:42:45,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:42:45,663 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-03 00:42:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:45,801 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-03 00:42:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:42:45,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-03 00:42:45,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:45,815 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:42:45,816 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:42:45,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:42:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:42:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-03 00:42:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-03 00:42:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-03 00:42:45,867 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-03 00:42:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:45,867 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-03 00:42:45,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-03 00:42:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-03 00:42:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 00:42:45,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:45,882 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:45,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:42:45,882 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2021-05-03 00:42:45,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:45,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36798396] [2021-05-03 00:42:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:45,886 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:45,910 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:42:45,910 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:42:45,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:42:45,929 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:42:45,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:42:45 BoogieIcfgContainer [2021-05-03 00:42:45,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:42:45,932 INFO L168 Benchmark]: Toolchain (without parser) took 1543.71 ms. Allocated memory is still 174.1 MB. Free memory was 139.9 MB in the beginning and 154.1 MB in the end (delta: -14.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:42:45,934 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 174.1 MB. Free memory is still 156.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:42:45,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.94 ms. Allocated memory is still 174.1 MB. Free memory was 139.7 MB in the beginning and 157.0 MB in the end (delta: -17.3 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:45,936 INFO L168 Benchmark]: Boogie Preprocessor took 47.35 ms. Allocated memory is still 174.1 MB. Free memory was 157.0 MB in the beginning and 155.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:45,937 INFO L168 Benchmark]: RCFGBuilder took 451.22 ms. Allocated memory is still 174.1 MB. Free memory was 155.5 MB in the beginning and 139.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:45,940 INFO L168 Benchmark]: TraceAbstraction took 694.96 ms. Allocated memory is still 174.1 MB. Free memory was 139.5 MB in the beginning and 154.1 MB in the end (delta: -14.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:42:45,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 174.1 MB. Free memory is still 156.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 325.94 ms. Allocated memory is still 174.1 MB. Free memory was 139.7 MB in the beginning and 157.0 MB in the end (delta: -17.3 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.35 ms. Allocated memory is still 174.1 MB. Free memory was 157.0 MB in the beginning and 155.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 451.22 ms. Allocated memory is still 174.1 MB. Free memory was 155.5 MB in the beginning and 139.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 694.96 ms. Allocated memory is still 174.1 MB. Free memory was 139.5 MB in the beginning and 154.1 MB in the end (delta: -14.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_unsigned_int() [L29] CALL assume_abort_if_not(A>=0 && A<=50) [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A>=0 && A<=50) [L30] B = __VERIFIER_nondet_unsigned_int() [L31] CALL assume_abort_if_not(B>=0 && B<=50) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B>=0 && B<=50) [L32] CALL assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L16] COND FALSE !(!cond) [L32] RET assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L33] CALL assume_abort_if_not(B >= 1) [L16] COND FALSE !(!cond) [L33] RET assume_abort_if_not(B >= 1) [L34] q = 0 [L35] r = A [L36] b = B [L37] COND TRUE 1 [L38] COND TRUE !(r >= b) [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 630.9ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 28.7ms, AutomataDifference: 169.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 33 SDtfs, 21 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...