/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/prod4br-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:39:41,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:39:41,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:39:41,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:39:41,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:39:41,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:39:41,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:39:41,194 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 00:39:41,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:39:41,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:39:41,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:39:41,221 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:39:41,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:39:41,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:39:41,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:39:41,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:39:41,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:39:41,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:39:41,222 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:39:41,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:39:41,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:39:41,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:39:41,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:39:41,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:39:41,224 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:39:41,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:39:41,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:39:41,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:39:41,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:39:41,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:39:41,225 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:39:41,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:39:41,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:39:41,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:39:41,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:39:41,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:39:41,703 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:39:41,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2021-05-03 00:39:41,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96b4d932a/03adad16cf72403892f138b669765c39/FLAG7978cc224 [2021-05-03 00:39:42,385 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:39:42,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2021-05-03 00:39:42,402 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96b4d932a/03adad16cf72403892f138b669765c39/FLAG7978cc224 [2021-05-03 00:39:42,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96b4d932a/03adad16cf72403892f138b669765c39 [2021-05-03 00:39:42,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:39:42,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:39:42,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:39:42,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:39:42,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:39:42,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:39:42" (1/1) ... [2021-05-03 00:39:42,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@501a4236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:42, skipping insertion in model container [2021-05-03 00:39:42,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:39:42" (1/1) ... [2021-05-03 00:39:42,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:39:42,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:39:42,979 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/prod4br-ll.c[524,537] [2021-05-03 00:39:43,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:39:43,026 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:39:43,044 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/prod4br-ll.c[524,537] [2021-05-03 00:39:43,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:39:43,108 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:39:43,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43 WrapperNode [2021-05-03 00:39:43,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:39:43,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:39:43,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:39:43,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:39:43,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43" (1/1) ... [2021-05-03 00:39:43,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43" (1/1) ... [2021-05-03 00:39:43,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43" (1/1) ... [2021-05-03 00:39:43,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43" (1/1) ... [2021-05-03 00:39:43,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43" (1/1) ... [2021-05-03 00:39:43,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43" (1/1) ... [2021-05-03 00:39:43,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43" (1/1) ... [2021-05-03 00:39:43,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:39:43,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:39:43,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:39:43,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:39:43,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43" (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 00:39:43,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:39:43,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:39:43,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:39:43,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:39:43,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:39:43,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:39:43,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:39:43,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:39:43,261 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:39:43,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:39:43,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:39:43,261 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:39:43,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:39:43,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:39:43,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:39:43,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:39:43,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:39:43,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:39:43,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:39:43,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:39:43,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:39:43,645 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:39:43,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:39:43 BoogieIcfgContainer [2021-05-03 00:39:43,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:39:43,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:39:43,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:39:43,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:39:43,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:39:42" (1/3) ... [2021-05-03 00:39:43,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e63d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:39:43, skipping insertion in model container [2021-05-03 00:39:43,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:43" (2/3) ... [2021-05-03 00:39:43,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e63d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:39:43, skipping insertion in model container [2021-05-03 00:39:43,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:39:43" (3/3) ... [2021-05-03 00:39:43,680 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll.c [2021-05-03 00:39:43,702 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:39:43,706 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:39:43,741 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:39:43,779 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:39:43,780 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:39:43,780 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:39:43,780 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:39:43,780 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:39:43,780 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:39:43,780 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:39:43,780 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:39:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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 00:39:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:39:43,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:43,811 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:43,812 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:43,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1051010973, now seen corresponding path program 1 times [2021-05-03 00:39:43,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:43,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405674702] [2021-05-03 00:39:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:43,906 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:44,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:44,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:39:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:44,198 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:44,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405674702] [2021-05-03 00:39:44,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405674702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:44,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:44,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:39:44,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850388968] [2021-05-03 00:39:44,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:39:44,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:39:44,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:39:44,240 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-03 00:39:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:44,394 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2021-05-03 00:39:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:39:44,396 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-03 00:39:44,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:44,406 INFO L225 Difference]: With dead ends: 53 [2021-05-03 00:39:44,407 INFO L226 Difference]: Without dead ends: 26 [2021-05-03 00:39:44,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:39:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-03 00:39:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-03 00:39:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 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 00:39:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-03 00:39:44,476 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-03 00:39:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:44,476 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-03 00:39:44,477 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-03 00:39:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-03 00:39:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:39:44,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:44,494 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:44,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:39:44,495 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1732856803, now seen corresponding path program 1 times [2021-05-03 00:39:44,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:44,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197444430] [2021-05-03 00:39:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:44,504 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:44,547 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:39:44,548 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:39:44,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:39:44,566 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:39:44,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:39:44 BoogieIcfgContainer [2021-05-03 00:39:44,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:39:44,570 INFO L168 Benchmark]: Toolchain (without parser) took 1801.82 ms. Allocated memory was 127.9 MB in the beginning and 190.8 MB in the end (delta: 62.9 MB). Free memory was 92.9 MB in the beginning and 171.6 MB in the end (delta: -78.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:39:44,572 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 127.9 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:39:44,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.26 ms. Allocated memory was 127.9 MB in the beginning and 190.8 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 174.6 MB in the end (delta: -82.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:44,575 INFO L168 Benchmark]: Boogie Preprocessor took 66.91 ms. Allocated memory is still 190.8 MB. Free memory was 174.6 MB in the beginning and 173.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:44,576 INFO L168 Benchmark]: RCFGBuilder took 453.17 ms. Allocated memory is still 190.8 MB. Free memory was 172.9 MB in the beginning and 157.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:44,576 INFO L168 Benchmark]: TraceAbstraction took 894.16 ms. Allocated memory is still 190.8 MB. Free memory was 156.6 MB in the beginning and 171.6 MB in the end (delta: -15.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:39:44,584 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 127.9 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 350.26 ms. Allocated memory was 127.9 MB in the beginning and 190.8 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 174.6 MB in the end (delta: -82.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.91 ms. Allocated memory is still 190.8 MB. Free memory was 174.6 MB in the beginning and 173.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 453.17 ms. Allocated memory is still 190.8 MB. Free memory was 172.9 MB in the beginning and 157.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 894.16 ms. Allocated memory is still 190.8 MB. Free memory was 156.6 MB in the beginning and 171.6 MB in the end (delta: -15.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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: [L20] int x, y; [L21] long long a, b, p, q; [L23] x = __VERIFIER_nondet_int() [L24] y = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L32] COND TRUE 1 [L33] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 777.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 30.3ms, AutomataDifference: 200.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 31 SDtfs, 21 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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: 43.8ms 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...