/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/ps4-ll_valuebound2.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-05-01 08:25:13,641 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-01 08:25:13,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-01 08:25:13,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-01 08:25:13,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-01 08:25:13,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-01 08:25:13,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-05-01 08:25:13,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
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[2021-05-01 08:25:13,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-01 08:25:13,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-01 08:25:13,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-01 08:25:13,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-01 08:25:13,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-01 08:25:13,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-01 08:25:13,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-01 08:25:13,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-01 08:25:13,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-01 08:25:13,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-05-01 08:25:13,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-05-01 08:25:13,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-05-01 08:25:13,769 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 08:25:13,780 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-01 08:25:13,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-01 08:25:13,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-01 08:25:13,782 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-01 08:25:13,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-01 08:25:13,782 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-01 08:25:13,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-01 08:25:13,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-01 08:25:13,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-01 08:25:13,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-01 08:25:13,783 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-01 08:25:13,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-01 08:25:13,783 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-01 08:25:13,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-01 08:25:13,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-01 08:25:13,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-01 08:25:13,784 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-05-01 08:25:13,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-01 08:25:13,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:25:13,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-01 08:25:13,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-01 08:25:13,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-01 08:25:13,786 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-01 08:25:13,786 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-05-01 08:25:14,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-01 08:25:14,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-01 08:25:14,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-01 08:25:14,102 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-01 08:25:14,103 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-01 08:25:14,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound2.c
[2021-05-01 08:25:14,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/031e029ef/d2a3821ffaae456a9d888843d0e3a42c/FLAGc0a8fa03c
[2021-05-01 08:25:14,491 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-01 08:25:14,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound2.c
[2021-05-01 08:25:14,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/031e029ef/d2a3821ffaae456a9d888843d0e3a42c/FLAGc0a8fa03c
[2021-05-01 08:25:14,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/031e029ef/d2a3821ffaae456a9d888843d0e3a42c
[2021-05-01 08:25:14,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-01 08:25:14,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-01 08:25:14,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-01 08:25:14,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-01 08:25:14,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-01 08:25:14,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:25:14" (1/1) ...
[2021-05-01 08:25:14,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1145fe9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:14, skipping insertion in model container
[2021-05-01 08:25:14,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:25:14" (1/1) ...
[2021-05-01 08:25:14,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-01 08:25:14,944 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-01 08:25:15,039 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/ps4-ll_valuebound2.c[458,471]
[2021-05-01 08:25:15,047 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:25:15,052 INFO L203 MainTranslator]: Completed pre-run
[2021-05-01 08:25:15,063 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/ps4-ll_valuebound2.c[458,471]
[2021-05-01 08:25:15,067 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:25:15,076 INFO L208 MainTranslator]: Completed translation
[2021-05-01 08:25:15,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15 WrapperNode
[2021-05-01 08:25:15,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-01 08:25:15,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-01 08:25:15,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-01 08:25:15,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-01 08:25:15,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15" (1/1) ...
[2021-05-01 08:25:15,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15" (1/1) ...
[2021-05-01 08:25:15,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15" (1/1) ...
[2021-05-01 08:25:15,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15" (1/1) ...
[2021-05-01 08:25:15,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15" (1/1) ...
[2021-05-01 08:25:15,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15" (1/1) ...
[2021-05-01 08:25:15,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15" (1/1) ...
[2021-05-01 08:25:15,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-01 08:25:15,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-01 08:25:15,110 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-01 08:25:15,110 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-01 08:25:15,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15" (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 08:25:15,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-01 08:25:15,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-01 08:25:15,224 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-01 08:25:15,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-01 08:25:15,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-01 08:25:15,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-01 08:25:15,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-01 08:25:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-01 08:25:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-01 08:25:15,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-01 08:25:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short
[2021-05-01 08:25:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-01 08:25:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-01 08:25:15,226 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-01 08:25:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-01 08:25:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-01 08:25:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-01 08:25:15,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-01 08:25:15,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-01 08:25:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-01 08:25:15,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-01 08:25:15,506 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-05-01 08:25:15,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:25:15 BoogieIcfgContainer
[2021-05-01 08:25:15,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-01 08:25:15,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-01 08:25:15,508 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-01 08:25:15,510 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-01 08:25:15,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:25:14" (1/3) ...
[2021-05-01 08:25:15,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee3026d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:25:15, skipping insertion in model container
[2021-05-01 08:25:15,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:25:15" (2/3) ...
[2021-05-01 08:25:15,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee3026d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:25:15, skipping insertion in model container
[2021-05-01 08:25:15,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:25:15" (3/3) ...
[2021-05-01 08:25:15,512 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound2.c
[2021-05-01 08:25:15,529 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-01 08:25:15,538 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-01 08:25:15,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-01 08:25:15,572 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-01 08:25:15,572 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-01 08:25:15,572 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-01 08:25:15,572 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-01 08:25:15,572 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-01 08:25:15,572 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-01 08:25:15,572 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-01 08:25:15,572 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-01 08:25:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 08:25:15,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-05-01 08:25:15,592 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:25:15,593 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 08:25:15,593 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:25:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:25:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times
[2021-05-01 08:25:15,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:25:15,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213246538]
[2021-05-01 08:25:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:25:15,642 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:25:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:15,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:15,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:15,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:15,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:15,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:25:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:15,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:15,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:15,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:25:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:25:15,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:15,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:15,767 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:25:15,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:25:15,768 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 08:25:15,769 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:25:15,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213246538]
[2021-05-01 08:25:15,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [213246538] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:25:15,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:25:15,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-01 08:25:15,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108492478]
[2021-05-01 08:25:15,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-01 08:25:15,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:25:15,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-01 08:25:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:25:15,785 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 08:25:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:25:17,890 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions.
[2021-05-01 08:25:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-01 08:25:17,894 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 08:25:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:25:17,899 INFO L225 Difference]: With dead ends: 47
[2021-05-01 08:25:17,899 INFO L226 Difference]: Without dead ends: 23
[2021-05-01 08:25:17,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:25:17,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2021-05-01 08:25:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2021-05-01 08:25:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 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 08:25:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions.
[2021-05-01 08:25:17,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17
[2021-05-01 08:25:17,953 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:25:17,953 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions.
[2021-05-01 08:25:17,953 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 08:25:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions.
[2021-05-01 08:25:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-05-01 08:25:17,954 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:25:17,954 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 08:25:17,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-01 08:25:17,955 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:25:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:25:17,955 INFO L82 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times
[2021-05-01 08:25:17,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:25:17,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465915503]
[2021-05-01 08:25:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:25:17,958 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:25:17,968 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-01 08:25:17,968 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-05-01 08:25:17,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-01 08:25:17,983 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-01 08:25:17,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:25:17 BoogieIcfgContainer
[2021-05-01 08:25:17,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-01 08:25:17,984 INFO L168 Benchmark]: Toolchain (without parser) took 3070.85 ms. Allocated memory is still 201.3 MB. Free memory was 167.0 MB in the beginning and 135.7 MB in the end (delta: 31.3 MB). Peak memory consumption was 30.6 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:17,985 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 201.3 MB. Free memory is still 183.7 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:25:17,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.04 ms. Allocated memory is still 201.3 MB. Free memory was 166.8 MB in the beginning and 157.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:17,986 INFO L168 Benchmark]: Boogie Preprocessor took 31.93 ms. Allocated memory is still 201.3 MB. Free memory was 157.0 MB in the beginning and 155.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:17,986 INFO L168 Benchmark]: RCFGBuilder took 397.29 ms. Allocated memory is still 201.3 MB. Free memory was 155.6 MB in the beginning and 171.6 MB in the end (delta: -16.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:17,987 INFO L168 Benchmark]: TraceAbstraction took 2475.37 ms. Allocated memory is still 201.3 MB. Free memory was 171.3 MB in the beginning and 135.7 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:25:17,988 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.14 ms. Allocated memory is still 201.3 MB. Free memory is still 183.7 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 160.04 ms. Allocated memory is still 201.3 MB. Free memory was 166.8 MB in the beginning and 157.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 31.93 ms. Allocated memory is still 201.3 MB. Free memory was 157.0 MB in the beginning and 155.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 397.29 ms. Allocated memory is still 201.3 MB. Free memory was 155.6 MB in the beginning and 171.6 MB in the end (delta: -16.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 2475.37 ms. Allocated memory is still 201.3 MB. Free memory was 171.3 MB in the beginning and 135.7 MB in the end (delta: 35.7 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:
[L18] short k;
[L19] long long y, x, c;
[L20] k = __VERIFIER_nondet_short()
[L21] CALL assume_abort_if_not(k>=0 && k<=2)
[L7] COND FALSE !(!cond)
[L21] RET assume_abort_if_not(k>=0 && k<=2)
[L23] y = 0
[L24] x = 0
[L25] c = 0
[L27] COND TRUE 1
[L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0)
[L10] COND TRUE !(cond)
[L12] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2406.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 10.9ms, AutomataDifference: 2126.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25 SDtfs, 14 SDslu, 3 SDs, 0 SdLazy, 6 SolverSat, 6 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2049.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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: 39.0ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces
Received shutdown request...