/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/geo1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:30:25,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:30:25,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:30:25,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:30:25,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:30:25,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:30:25,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:30:25,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:30:25,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:30:25,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:30:25,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:30:25,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:30:25,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:30:25,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:30:25,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:30:25,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:30:25,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:30:25,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:30:25,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:30:25,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:30:25,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:30:25,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:30:25,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:30:25,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:30:25,358 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:30:25,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:30:25,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:30:25,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:30:25,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:30:25,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:30:25,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:30:25,359 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:30:25,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:30:25,359 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:30:25,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:30:25,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:30:25,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:30:25,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:30:25,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:30:25,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:30:25,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:30:25,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:30:25,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:30:25,360 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:30:25,360 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:30:25,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:30:25,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:30:25,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:30:25,634 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:30:25,635 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:30:25,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound20.c [2021-05-06 12:30:25,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e214efbb/f363178aad24469784f1cb0bc5949f05/FLAG2640c6bc3 [2021-05-06 12:30:26,074 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:30:26,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound20.c [2021-05-06 12:30:26,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e214efbb/f363178aad24469784f1cb0bc5949f05/FLAG2640c6bc3 [2021-05-06 12:30:26,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e214efbb/f363178aad24469784f1cb0bc5949f05 [2021-05-06 12:30:26,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:30:26,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:30:26,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:30:26,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:30:26,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:30:26,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:30:26" (1/1) ... [2021-05-06 12:30:26,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c01b6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26, skipping insertion in model container [2021-05-06 12:30:26,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:30:26" (1/1) ... [2021-05-06 12:30:26,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:30:26,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:30:26,627 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-ll_unwindbound20.c[546,559] [2021-05-06 12:30:26,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:30:26,657 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:30:26,678 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-ll_unwindbound20.c[546,559] [2021-05-06 12:30:26,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:30:26,714 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:30:26,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26 WrapperNode [2021-05-06 12:30:26,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:30:26,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:30:26,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:30:26,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:30:26,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26" (1/1) ... [2021-05-06 12:30:26,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26" (1/1) ... [2021-05-06 12:30:26,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26" (1/1) ... [2021-05-06 12:30:26,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26" (1/1) ... [2021-05-06 12:30:26,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26" (1/1) ... [2021-05-06 12:30:26,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26" (1/1) ... [2021-05-06 12:30:26,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26" (1/1) ... [2021-05-06 12:30:26,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:30:26,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:30:26,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:30:26,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:30:26,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:30:26,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:30:26,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:30:26,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:30:26,805 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:30:26,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:30:26,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:30:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:30:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:30:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:30:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:30:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 12:30:26,806 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:30:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:30:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:30:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:30:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:30:26,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:30:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:30:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:30:26,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:30:26,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:30:26,997 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:30:26,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:30:26 BoogieIcfgContainer [2021-05-06 12:30:26,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:30:26,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:30:26,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:30:27,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:30:27,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:30:26" (1/3) ... [2021-05-06 12:30:27,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5f914a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:30:27, skipping insertion in model container [2021-05-06 12:30:27,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:26" (2/3) ... [2021-05-06 12:30:27,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c5f914a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:30:27, skipping insertion in model container [2021-05-06 12:30:27,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:30:26" (3/3) ... [2021-05-06 12:30:27,003 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound20.c [2021-05-06 12:30:27,007 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:30:27,009 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:30:27,026 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:30:27,041 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:30:27,041 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:30:27,041 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:30:27,041 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:30:27,041 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:30:27,041 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:30:27,041 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:30:27,041 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:30:27,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2021-05-06 12:30:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 12:30:27,068 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:30:27,069 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:30:27,069 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:30:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:30:27,072 INFO L82 PathProgramCache]: Analyzing trace with hash 730417173, now seen corresponding path program 1 times [2021-05-06 12:30:27,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:30:27,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837493227] [2021-05-06 12:30:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:30:27,137 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:30:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:27,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:30:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:27,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:30:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:27,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:30:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 12:30:27,281 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:30:27,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837493227] [2021-05-06 12:30:27,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1837493227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:30:27,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:30:27,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:30:27,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192917963] [2021-05-06 12:30:27,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:30:27,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:30:27,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:30:27,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:30:27,298 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 12:30:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:30:27,401 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2021-05-06 12:30:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:30:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 12:30:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:30:27,409 INFO L225 Difference]: With dead ends: 54 [2021-05-06 12:30:27,409 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 12:30:27,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:30:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 12:30:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 12:30:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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) [2021-05-06 12:30:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 12:30:27,453 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2021-05-06 12:30:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:30:27,454 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 12:30:27,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 12:30:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 12:30:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 12:30:27,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:30:27,456 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:30:27,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:30:27,456 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:30:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:30:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash -942473515, now seen corresponding path program 1 times [2021-05-06 12:30:27,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:30:27,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628534567] [2021-05-06 12:30:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:30:27,466 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:30:27,500 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:30:27,500 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:30:27,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:30:27,514 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:30:27,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:30:27 BoogieIcfgContainer [2021-05-06 12:30:27,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:30:27,517 INFO L168 Benchmark]: Toolchain (without parser) took 1003.41 ms. Allocated memory is still 196.1 MB. Free memory was 160.7 MB in the beginning and 177.2 MB in the end (delta: -16.5 MB). Peak memory consumption was 36.9 MB. Max. memory is 8.0 GB. [2021-05-06 12:30:27,518 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 196.1 MB. Free memory is still 177.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:30:27,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.19 ms. Allocated memory is still 196.1 MB. Free memory was 160.5 MB in the beginning and 179.0 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-06 12:30:27,519 INFO L168 Benchmark]: Boogie Preprocessor took 33.20 ms. Allocated memory is still 196.1 MB. Free memory was 179.0 MB in the beginning and 177.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:30:27,520 INFO L168 Benchmark]: RCFGBuilder took 248.30 ms. Allocated memory is still 196.1 MB. Free memory was 177.7 MB in the beginning and 162.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:30:27,520 INFO L168 Benchmark]: TraceAbstraction took 515.62 ms. Allocated memory is still 196.1 MB. Free memory was 162.3 MB in the beginning and 177.2 MB in the end (delta: -14.9 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. [2021-05-06 12:30:27,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 196.1 MB. Free memory is still 177.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 198.19 ms. Allocated memory is still 196.1 MB. Free memory was 160.5 MB in the beginning and 179.0 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.20 ms. Allocated memory is still 196.1 MB. Free memory was 179.0 MB in the beginning and 177.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 248.30 ms. Allocated memory is still 196.1 MB. Free memory was 177.7 MB in the beginning and 162.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 515.62 ms. Allocated memory is still 196.1 MB. Free memory was 162.3 MB in the beginning and 177.2 MB in the end (delta: -14.9 MB). Peak memory consumption was 38.8 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 z, k; [L25] long long x, y, c; [L26] z = __VERIFIER_nondet_int() [L27] k = __VERIFIER_nondet_int() [L28] CALL assume_abort_if_not(z >= 1) [L13] COND FALSE !(!cond) [L28] RET assume_abort_if_not(z >= 1) [L29] CALL assume_abort_if_not(k >= 1) [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(k >= 1) [L31] x = 1 [L32] y = z [L33] c = 1 [L35] EXPR counter++ [L35] COND TRUE counter++<20 [L36] 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 464.3ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 20.6ms, AutomataDifference: 124.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 15 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms 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: 32.7ms 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...