/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/mannadiv_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:45:26,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:45:26,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:45:26,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:45:26,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:45:26,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:45:26,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:45:26,103 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 00:45:26,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:45:26,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:45:26,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:45:26,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:45:26,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:45:26,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:45:26,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:45:26,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:45:26,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:45:26,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:45:26,118 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:45:26,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:45:26,118 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:45:26,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:45:26,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:45:26,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:45:26,119 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:45:26,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:45:26,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:45:26,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:45:26,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:45:26,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:45:26,119 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:45:26,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:45:26,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:45:26,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:45:26,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:45:26,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:45:26,460 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:45:26,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-05-03 00:45:26,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8e24469/8365a891cce947f69cd10a3820a14a80/FLAG6ca773d27 [2021-05-03 00:45:26,882 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:45:26,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-05-03 00:45:26,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8e24469/8365a891cce947f69cd10a3820a14a80/FLAG6ca773d27 [2021-05-03 00:45:26,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8e24469/8365a891cce947f69cd10a3820a14a80 [2021-05-03 00:45:26,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:45:26,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:45:26,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:45:26,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:45:26,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:45:26,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:45:26" (1/1) ... [2021-05-03 00:45:26,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c69f10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:26, skipping insertion in model container [2021-05-03 00:45:26,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:45:26" (1/1) ... [2021-05-03 00:45:26,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:45:26,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:45:27,056 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/mannadiv_unwindbound50.c[573,586] [2021-05-03 00:45:27,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:45:27,077 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:45:27,087 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/mannadiv_unwindbound50.c[573,586] [2021-05-03 00:45:27,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:45:27,114 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:45:27,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27 WrapperNode [2021-05-03 00:45:27,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:45:27,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:45:27,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:45:27,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:45:27,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27" (1/1) ... [2021-05-03 00:45:27,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27" (1/1) ... [2021-05-03 00:45:27,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27" (1/1) ... [2021-05-03 00:45:27,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27" (1/1) ... [2021-05-03 00:45:27,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27" (1/1) ... [2021-05-03 00:45:27,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27" (1/1) ... [2021-05-03 00:45:27,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27" (1/1) ... [2021-05-03 00:45:27,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:45:27,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:45:27,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:45:27,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:45:27,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27" (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 00:45:27,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:45:27,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:45:27,307 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:45:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:45:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:45:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:45:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:45:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:45:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:45:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:45:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:45:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:45:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:45:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:45:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:45:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:45:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:45:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:45:27,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:45:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:45:27,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:45:27,597 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:45:27,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:45:27 BoogieIcfgContainer [2021-05-03 00:45:27,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:45:27,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:45:27,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:45:27,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:45:27,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:45:26" (1/3) ... [2021-05-03 00:45:27,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f0358a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:45:27, skipping insertion in model container [2021-05-03 00:45:27,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:27" (2/3) ... [2021-05-03 00:45:27,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f0358a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:45:27, skipping insertion in model container [2021-05-03 00:45:27,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:45:27" (3/3) ... [2021-05-03 00:45:27,610 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound50.c [2021-05-03 00:45:27,614 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:45:27,617 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:45:27,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:45:27,653 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:45:27,653 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:45:27,653 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:45:27,653 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:45:27,653 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:45:27,653 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:45:27,653 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:45:27,653 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:45:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-03 00:45:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:45:27,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:27,676 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:27,676 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-03 00:45:27,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:27,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458342458] [2021-05-03 00:45:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:27,739 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:45:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:27,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:45:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:27,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:45:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:27,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:45:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 00:45:27,890 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:45:27,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458342458] [2021-05-03 00:45:27,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1458342458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:45:27,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:45:27,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:45:27,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669468962] [2021-05-03 00:45:27,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:45:27,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:45:27,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:45:27,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:45:27,904 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-05-03 00:45:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:45:27,976 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-03 00:45:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:45:27,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 22 [2021-05-03 00:45:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:45:27,982 INFO L225 Difference]: With dead ends: 54 [2021-05-03 00:45:27,982 INFO L226 Difference]: Without dead ends: 26 [2021-05-03 00:45:27,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:45:27,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-03 00:45:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-03 00:45:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-03 00:45:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-03 00:45:28,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-03 00:45:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:45:28,019 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-03 00:45:28,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-05-03 00:45:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-03 00:45:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:45:28,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:28,021 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] [2021-05-03 00:45:28,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:45:28,021 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-03 00:45:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:28,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453427868] [2021-05-03 00:45:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:28,025 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:45:28,038 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:45:28,038 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:45:28,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:45:28,051 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:45:28,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:45:28 BoogieIcfgContainer [2021-05-03 00:45:28,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:45:28,053 INFO L168 Benchmark]: Toolchain (without parser) took 1143.74 ms. Allocated memory is still 200.3 MB. Free memory was 165.7 MB in the beginning and 130.5 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:28,053 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 200.3 MB. Free memory is still 182.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:45:28,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.45 ms. Allocated memory is still 200.3 MB. Free memory was 165.5 MB in the beginning and 155.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:28,054 INFO L168 Benchmark]: Boogie Preprocessor took 110.88 ms. Allocated memory is still 200.3 MB. Free memory was 155.9 MB in the beginning and 183.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:28,054 INFO L168 Benchmark]: RCFGBuilder took 362.39 ms. Allocated memory is still 200.3 MB. Free memory was 183.4 MB in the beginning and 167.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:28,055 INFO L168 Benchmark]: TraceAbstraction took 445.77 ms. Allocated memory is still 200.3 MB. Free memory was 167.2 MB in the beginning and 130.5 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:28,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 200.3 MB. Free memory is still 182.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 204.45 ms. Allocated memory is still 200.3 MB. Free memory was 165.5 MB in the beginning and 155.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 110.88 ms. Allocated memory is still 200.3 MB. Free memory was 155.9 MB in the beginning and 183.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 362.39 ms. Allocated memory is still 200.3 MB. Free memory was 183.4 MB in the beginning and 167.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 445.77 ms. Allocated memory is still 200.3 MB. Free memory was 167.2 MB in the beginning and 130.5 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 18]: 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: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x1 >= 0) [L30] CALL assume_abort_if_not(x2 != 0) [L13] COND FALSE !(!cond) [L30] RET assume_abort_if_not(x2 != 0) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 [L36] EXPR counter++ [L36] COND FALSE !(counter++<50) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 391.4ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 11.3ms, AutomataDifference: 89.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 16 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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: 22.8ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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...