/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:23:29,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:23:29,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:23:29,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:23:29,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:23:29,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:23:29,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:23:29,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:23:29,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:23:29,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:23:29,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:23:29,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:23:29,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:23:29,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:23:29,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:23:29,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:23:29,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:23:29,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:23:29,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:23:29,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:23:29,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:23:29,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:23:29,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:23:29,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:23:29,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:23:29,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:23:29,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:23:29,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:23:29,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:23:29,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:23:29,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:23:29,753 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:23:29,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:23:29,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:23:29,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:23:29,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:23:29,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:23:29,753 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:23:29,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:23:29,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:23:29,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:23:29,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:23:29,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:23:29,754 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:23:29,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:23:30,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:23:30,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:23:30,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:23:30,032 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:23:30,033 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:23:30,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound20.c [2021-05-01 08:23:30,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fdc6fa9/f9c595f818824d278bdb6e850bc34364/FLAGcd811bb6e [2021-05-01 08:23:30,465 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:23:30,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound20.c [2021-05-01 08:23:30,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fdc6fa9/f9c595f818824d278bdb6e850bc34364/FLAGcd811bb6e [2021-05-01 08:23:30,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5fdc6fa9/f9c595f818824d278bdb6e850bc34364 [2021-05-01 08:23:30,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:23:30,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:23:30,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:23:30,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:23:30,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:23:30,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:23:30" (1/1) ... [2021-05-01 08:23:30,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264aaa1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30, skipping insertion in model container [2021-05-01 08:23:30,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:23:30" (1/1) ... [2021-05-01 08:23:30,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:23:30,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:23:30,605 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/geo1-u_unwindbound20.c[563,576] [2021-05-01 08:23:30,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:23:30,624 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:23:30,634 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/geo1-u_unwindbound20.c[563,576] [2021-05-01 08:23:30,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:23:30,657 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:23:30,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30 WrapperNode [2021-05-01 08:23:30,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:23:30,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:23:30,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:23:30,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:23:30,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30" (1/1) ... [2021-05-01 08:23:30,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30" (1/1) ... [2021-05-01 08:23:30,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30" (1/1) ... [2021-05-01 08:23:30,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30" (1/1) ... [2021-05-01 08:23:30,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30" (1/1) ... [2021-05-01 08:23:30,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30" (1/1) ... [2021-05-01 08:23:30,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30" (1/1) ... [2021-05-01 08:23:30,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:23:30,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:23:30,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:23:30,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:23:30,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30" (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 [2021-05-01 08:23:30,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:23:30,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:23:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:23:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:23:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:23:30,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:23:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:23:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:23:30,796 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:23:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:23:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:23:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:23:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:23:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:23:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:23:30,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:23:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:23:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:23:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:23:30,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:23:31,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:23:31,045 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:23:31,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:31 BoogieIcfgContainer [2021-05-01 08:23:31,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:23:31,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:23:31,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:23:31,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:23:31,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:23:30" (1/3) ... [2021-05-01 08:23:31,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b42c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:31, skipping insertion in model container [2021-05-01 08:23:31,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:30" (2/3) ... [2021-05-01 08:23:31,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b42c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:31, skipping insertion in model container [2021-05-01 08:23:31,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:31" (3/3) ... [2021-05-01 08:23:31,051 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-u_unwindbound20.c [2021-05-01 08:23:31,072 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:23:31,075 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:23:31,103 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:23:31,122 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:23:31,123 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:23:31,123 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:23:31,123 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:23:31,123 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:23:31,123 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:23:31,123 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:23:31,123 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:23:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 08:23:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:23:31,142 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:23:31,142 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:23:31,143 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:23:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:23:31,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1864317590, now seen corresponding path program 1 times [2021-05-01 08:23:31,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:23:31,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402091268] [2021-05-01 08:23:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:23:31,205 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:23:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:31,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:31,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:31,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:31,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:31,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:23:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:31,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:31,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:23:31,406 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:23:31,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402091268] [2021-05-01 08:23:31,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [402091268] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:23:31,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:23:31,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:23:31,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654160974] [2021-05-01 08:23:31,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:23:31,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:23:31,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:23:31,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:23:31,422 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:23:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:23:31,495 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-05-01 08:23:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:23:31,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-01 08:23:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:23:31,502 INFO L225 Difference]: With dead ends: 41 [2021-05-01 08:23:31,502 INFO L226 Difference]: Without dead ends: 19 [2021-05-01 08:23:31,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:23:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-01 08:23:31,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-01 08:23:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 08:23:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-01 08:23:31,553 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-05-01 08:23:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:23:31,554 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-01 08:23:31,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 08:23:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-01 08:23:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:23:31,555 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:23:31,555 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:23:31,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:23:31,556 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:23:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:23:31,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2049175951, now seen corresponding path program 1 times [2021-05-01 08:23:31,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:23:31,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160700365] [2021-05-01 08:23:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:23:31,569 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:23:31,585 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:23:31,586 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:23:31,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:23:31,598 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:23:31,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:23:31 BoogieIcfgContainer [2021-05-01 08:23:31,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:23:31,599 INFO L168 Benchmark]: Toolchain (without parser) took 1103.98 ms. Allocated memory is still 195.0 MB. Free memory was 160.7 MB in the beginning and 132.7 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:31,600 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 177.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:23:31,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.13 ms. Allocated memory is still 195.0 MB. Free memory was 160.5 MB in the beginning and 150.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:31,600 INFO L168 Benchmark]: Boogie Preprocessor took 40.20 ms. Allocated memory is still 195.0 MB. Free memory was 150.8 MB in the beginning and 149.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:31,601 INFO L168 Benchmark]: RCFGBuilder took 345.03 ms. Allocated memory is still 195.0 MB. Free memory was 149.3 MB in the beginning and 165.2 MB in the end (delta: -15.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:31,601 INFO L168 Benchmark]: TraceAbstraction took 551.34 ms. Allocated memory is still 195.0 MB. Free memory was 164.9 MB in the beginning and 132.7 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:31,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 177.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 160.13 ms. Allocated memory is still 195.0 MB. Free memory was 160.5 MB in the beginning and 150.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.20 ms. Allocated memory is still 195.0 MB. Free memory was 150.8 MB in the beginning and 149.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 345.03 ms. Allocated memory is still 195.0 MB. Free memory was 149.3 MB in the beginning and 165.2 MB in the end (delta: -15.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 551.34 ms. Allocated memory is still 195.0 MB. Free memory was 164.9 MB in the beginning and 132.7 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.5 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] unsigned int z, k; [L25] long long x, y, c; [L26] z = __VERIFIER_nondet_unsigned_int() [L27] k = __VERIFIER_nondet_unsigned_int() [L29] x = 1 [L30] y = z [L31] c = 1 [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(x*z - x - y + 1 == 0) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 468.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 10.7ms, AutomataDifference: 92.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 23 SDtfs, 6 SDslu, 4 SDs, 0 SdLazy, 13 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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: 38.7ms 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...