/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/ps5-ll_unwindbound50.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-05-01 08:25:22,993 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-01 08:25:22,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
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[2021-05-01 08:25:23,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-01 08:25:23,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-01 08:25:23,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2021-05-01 08:25:23,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-01 08:25:23,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-01 08:25:23,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-01 08:25:23,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-01 08:25:23,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
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[2021-05-01 08:25:23,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-01 08:25:23,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-05-01 08:25:23,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-05-01 08:25:23,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-05-01 08:25:23,224 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 08:25:23,275 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-01 08:25:23,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-01 08:25:23,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-01 08:25:23,293 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-01 08:25:23,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-01 08:25:23,293 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-01 08:25:23,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-01 08:25:23,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-01 08:25:23,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-01 08:25:23,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-01 08:25:23,295 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-01 08:25:23,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-01 08:25:23,295 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-01 08:25:23,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-01 08:25:23,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-01 08:25:23,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-01 08:25:23,296 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-05-01 08:25:23,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-01 08:25:23,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:25:23,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-01 08:25:23,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-01 08:25:23,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-01 08:25:23,297 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-01 08:25:23,297 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-05-01 08:25:24,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-01 08:25:24,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-01 08:25:24,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-01 08:25:24,247 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-01 08:25:24,257 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-01 08:25:24,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound50.c
[2021-05-01 08:25:24,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21be91b7d/62c49d98651f42a689e684949a5e4798/FLAG00b33f582
[2021-05-01 08:25:25,463 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-01 08:25:25,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound50.c
[2021-05-01 08:25:25,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21be91b7d/62c49d98651f42a689e684949a5e4798/FLAG00b33f582
[2021-05-01 08:25:25,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21be91b7d/62c49d98651f42a689e684949a5e4798
[2021-05-01 08:25:25,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-01 08:25:25,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-01 08:25:25,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-01 08:25:25,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-01 08:25:25,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-01 08:25:25,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:25:25" (1/1) ...
[2021-05-01 08:25:25,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4544cf6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:25, skipping insertion in model container
[2021-05-01 08:25:25,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:25:25" (1/1) ...
[2021-05-01 08:25:25,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-01 08:25:25,614 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-01 08:25:25,940 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/ps5-ll_unwindbound50.c[458,471]
[2021-05-01 08:25:25,997 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:25:26,021 INFO L203 MainTranslator]: Completed pre-run
[2021-05-01 08:25:26,045 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/ps5-ll_unwindbound50.c[458,471]
[2021-05-01 08:25:26,085 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:25:26,155 INFO L208 MainTranslator]: Completed translation
[2021-05-01 08:25:26,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26 WrapperNode
[2021-05-01 08:25:26,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-01 08:25:26,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-01 08:25:26,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-01 08:25:26,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-01 08:25:26,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26" (1/1) ...
[2021-05-01 08:25:26,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26" (1/1) ...
[2021-05-01 08:25:26,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26" (1/1) ...
[2021-05-01 08:25:26,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26" (1/1) ...
[2021-05-01 08:25:26,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26" (1/1) ...
[2021-05-01 08:25:26,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26" (1/1) ...
[2021-05-01 08:25:26,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26" (1/1) ...
[2021-05-01 08:25:26,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-01 08:25:26,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-01 08:25:26,283 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-01 08:25:26,283 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-01 08:25:26,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26" (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
[2021-05-01 08:25:26,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-01 08:25:26,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-01 08:25:26,472 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-01 08:25:26,485 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-01 08:25:26,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-01 08:25:26,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-01 08:25:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-01 08:25:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-01 08:25:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-01 08:25:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-01 08:25:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short
[2021-05-01 08:25:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-01 08:25:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-01 08:25:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-01 08:25:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-01 08:25:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-01 08:25:26,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-01 08:25:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-01 08:25:26,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-01 08:25:26,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-01 08:25:27,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-01 08:25:27,020 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-05-01 08:25:27,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:25:27 BoogieIcfgContainer
[2021-05-01 08:25:27,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-01 08:25:27,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-01 08:25:27,049 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-01 08:25:27,052 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-01 08:25:27,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:25:25" (1/3) ...
[2021-05-01 08:25:27,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43290ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:25:27, skipping insertion in model container
[2021-05-01 08:25:27,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:26" (2/3) ...
[2021-05-01 08:25:27,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43290ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:25:27, skipping insertion in model container
[2021-05-01 08:25:27,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:25:27" (3/3) ...
[2021-05-01 08:25:27,068 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound50.c
[2021-05-01 08:25:27,074 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-01 08:25:27,101 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-01 08:25:27,170 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-01 08:25:27,236 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-01 08:25:27,236 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-01 08:25:27,236 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-01 08:25:27,237 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-01 08:25:27,237 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-01 08:25:27,237 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-01 08:25:27,237 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-01 08:25:27,237 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-01 08:25:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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)
[2021-05-01 08:25:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-05-01 08:25:27,297 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:25:27,298 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:25:27,321 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:25:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:25:27,337 INFO L82 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times
[2021-05-01 08:25:27,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:25:27,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486262982]
[2021-05-01 08:25:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:25:27,530 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:25:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:27,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:27,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:27,774 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:27,774 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:27,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:25:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:27,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:27,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:27,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:25:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:27,871 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:27,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:27,875 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:27,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:27,879 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 08:25:27,880 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:25:27,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486262982]
[2021-05-01 08:25:27,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [486262982] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:25:27,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:25:27,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-01 08:25:27,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777945937]
[2021-05-01 08:25:27,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-01 08:25:27,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:25:27,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-01 08:25:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:25:27,917 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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)
[2021-05-01 08:25:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:25:28,061 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions.
[2021-05-01 08:25:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-01 08:25:28,064 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
[2021-05-01 08:25:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:25:28,071 INFO L225 Difference]: With dead ends: 50
[2021-05-01 08:25:28,071 INFO L226 Difference]: Without dead ends: 25
[2021-05-01 08:25:28,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:25:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2021-05-01 08:25:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24.
[2021-05-01 08:25:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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)
[2021-05-01 08:25:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions.
[2021-05-01 08:25:28,138 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17
[2021-05-01 08:25:28,138 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:25:28,139 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions.
[2021-05-01 08:25:28,139 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)
[2021-05-01 08:25:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions.
[2021-05-01 08:25:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2021-05-01 08:25:28,144 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:25:28,145 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:25:28,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-01 08:25:28,146 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:25:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:25:28,148 INFO L82 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times
[2021-05-01 08:25:28,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:25:28,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998880289]
[2021-05-01 08:25:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:25:28,157 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:25:28,195 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-01 08:25:28,196 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-05-01 08:25:28,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-01 08:25:28,220 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-01 08:25:28,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:25:28 BoogieIcfgContainer
[2021-05-01 08:25:28,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-01 08:25:28,225 INFO L168 Benchmark]: Toolchain (without parser) took 2693.55 ms. Allocated memory is still 179.3 MB. Free memory was 144.1 MB in the beginning and 110.8 MB in the end (delta: 33.3 MB). Peak memory consumption was 33.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:28,226 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 179.3 MB. Free memory is still 160.8 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:25:28,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 651.59 ms. Allocated memory is still 179.3 MB. Free memory was 143.9 MB in the beginning and 163.3 MB in the end (delta: -19.3 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:28,229 INFO L168 Benchmark]: Boogie Preprocessor took 83.75 ms. Allocated memory is still 179.3 MB. Free memory was 163.3 MB in the beginning and 161.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:28,230 INFO L168 Benchmark]: RCFGBuilder took 764.14 ms. Allocated memory is still 179.3 MB. Free memory was 161.8 MB in the beginning and 147.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:28,253 INFO L168 Benchmark]: TraceAbstraction took 1173.60 ms. Allocated memory is still 179.3 MB. Free memory was 146.8 MB in the beginning and 110.8 MB in the end (delta: 36.0 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:28,260 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.45 ms. Allocated memory is still 179.3 MB. Free memory is still 160.8 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 651.59 ms. Allocated memory is still 179.3 MB. Free memory was 143.9 MB in the beginning and 163.3 MB in the end (delta: -19.3 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 83.75 ms. Allocated memory is still 179.3 MB. Free memory was 163.3 MB in the beginning and 161.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 764.14 ms. Allocated memory is still 179.3 MB. Free memory was 161.8 MB in the beginning and 147.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 1173.60 ms. Allocated memory is still 179.3 MB. Free memory was 146.8 MB in the beginning and 110.8 MB in the end (delta: 36.0 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 12]: 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:
[L17] int counter = 0;
[L19] short k;
[L20] long long y, x, c;
[L21] k = __VERIFIER_nondet_short()
[L22] CALL assume_abort_if_not(k <= 256)
[L7] COND FALSE !(!cond)
[L22] RET assume_abort_if_not(k <= 256)
[L24] y = 0
[L25] x = 0
[L26] c = 0
[L28] EXPR counter++
[L28] COND FALSE !(counter++<50)
[L39] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0)
[L10] COND TRUE !(cond)
[L12] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 995.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 29.0ms, AutomataDifference: 184.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 14 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: 48.0ms 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...