/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-21 21:17:37,316 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-02-21 21:17:37,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-02-21 21:17:37,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-02-21 21:17:37,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-02-21 21:17:37,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-02-21 21:17:37,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2021-02-21 21:17:37,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-02-21 21:17:37,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-02-21 21:17:37,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
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[2021-02-21 21:17:37,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-02-21 21:17:37,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-21 21:17:37,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-21 21:17:37,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-21 21:17:37,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-21 21:17:37,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-21 21:17:37,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-21 21:17:37,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-02-21 21:17:37,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-02-21 21:17:37,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-02-21 21:17:37,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-02-21 21:17:37,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2021-02-21 21:17:37,518 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-21 21:17:37,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-21 21:17:37,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-21 21:17:37,523 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-21 21:17:37,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-21 21:17:37,524 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-21 21:17:37,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-21 21:17:37,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-21 21:17:37,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-21 21:17:37,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-21 21:17:37,526 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-21 21:17:37,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-21 21:17:37,527 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-21 21:17:37,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-21 21:17:37,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-21 21:17:37,528 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2021-02-21 21:17:37,528 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-02-21 21:17:37,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-21 21:17:37,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-21 21:17:37,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-21 21:17:37,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-21 21:17:37,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-21 21:17:37,529 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-21 21:17:37,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-21 21:17:38,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-21 21:17:38,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-21 21:17:38,014 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-21 21:17:38,019 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-21 21:17:38,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i
[2021-02-21 21:17:38,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f75166631/70b59e0fc7ec4ecf8ea95aa37c2d9cba/FLAG99f4c8de1
[2021-02-21 21:17:38,820 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-21 21:17:38,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i
[2021-02-21 21:17:38,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f75166631/70b59e0fc7ec4ecf8ea95aa37c2d9cba/FLAG99f4c8de1
[2021-02-21 21:17:39,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f75166631/70b59e0fc7ec4ecf8ea95aa37c2d9cba
[2021-02-21 21:17:39,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-21 21:17:39,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-21 21:17:39,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-21 21:17:39,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-21 21:17:39,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-21 21:17:39,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:39" (1/1) ...
[2021-02-21 21:17:39,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77dff384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39, skipping insertion in model container
[2021-02-21 21:17:39,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:39" (1/1) ...
[2021-02-21 21:17:39,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-21 21:17:39,235 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-21 21:17:39,398 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i[808,821]
[2021-02-21 21:17:39,411 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-21 21:17:39,422 INFO L203 MainTranslator]: Completed pre-run
[2021-02-21 21:17:39,439 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i[808,821]
[2021-02-21 21:17:39,443 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-21 21:17:39,463 INFO L208 MainTranslator]: Completed translation
[2021-02-21 21:17:39,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39 WrapperNode
[2021-02-21 21:17:39,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-21 21:17:39,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-21 21:17:39,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-21 21:17:39,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-21 21:17:39,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39" (1/1) ...
[2021-02-21 21:17:39,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39" (1/1) ...
[2021-02-21 21:17:39,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39" (1/1) ...
[2021-02-21 21:17:39,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39" (1/1) ...
[2021-02-21 21:17:39,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39" (1/1) ...
[2021-02-21 21:17:39,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39" (1/1) ...
[2021-02-21 21:17:39,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39" (1/1) ...
[2021-02-21 21:17:39,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-21 21:17:39,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-21 21:17:39,508 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-21 21:17:39,508 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-21 21:17:39,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39" (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
[2021-02-21 21:17:39,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-21 21:17:39,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-21 21:17:39,625 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-21 21:17:39,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-02-21 21:17:39,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-21 21:17:39,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-21 21:17:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-21 21:17:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail
[2021-02-21 21:17:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert
[2021-02-21 21:17:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-21 21:17:39,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-21 21:17:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-02-21 21:17:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2021-02-21 21:17:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-21 21:17:39,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-21 21:17:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-21 21:17:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-21 21:17:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-21 21:17:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-21 21:17:39,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-21 21:17:39,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-21 21:17:39,980 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-02-21 21:17:39,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:39 BoogieIcfgContainer
[2021-02-21 21:17:39,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-21 21:17:39,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-21 21:17:39,994 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-21 21:17:40,002 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-21 21:17:40,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:17:39" (1/3) ...
[2021-02-21 21:17:40,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4815de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:40, skipping insertion in model container
[2021-02-21 21:17:40,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:39" (2/3) ...
[2021-02-21 21:17:40,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4815de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:40, skipping insertion in model container
[2021-02-21 21:17:40,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:39" (3/3) ...
[2021-02-21 21:17:40,011 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i
[2021-02-21 21:17:40,027 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-21 21:17:40,035 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-21 21:17:40,058 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-21 21:17:40,099 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-21 21:17:40,100 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-21 21:17:40,100 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-21 21:17:40,100 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-21 21:17:40,100 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-21 21:17:40,100 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-21 21:17:40,101 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-21 21:17:40,101 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-21 21:17:40,128 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states.
[2021-02-21 21:17:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2021-02-21 21:17:40,140 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 21:17:40,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-21 21:17:40,142 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 21:17:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 21:17:40,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2011116622, now seen corresponding path program 1 times
[2021-02-21 21:17:40,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 21:17:40,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374653233]
[2021-02-21 21:17:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 21:17:40,260 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-21 21:17:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:17:40,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:40,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:40,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:40,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:40,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-21 21:17:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:17:40,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:40,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-21 21:17:40,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374653233]
[2021-02-21 21:17:40,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-21 21:17:40,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-02-21 21:17:40,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414165989]
[2021-02-21 21:17:40,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-02-21 21:17:40,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-21 21:17:40,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-02-21 21:17:40,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-21 21:17:40,605 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states.
[2021-02-21 21:17:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-21 21:17:40,696 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions.
[2021-02-21 21:17:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-02-21 21:17:40,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2021-02-21 21:17:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-21 21:17:40,706 INFO L225 Difference]: With dead ends: 45
[2021-02-21 21:17:40,707 INFO L226 Difference]: Without dead ends: 27
[2021-02-21 21:17:40,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-02-21 21:17:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2021-02-21 21:17:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2021-02-21 21:17:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2021-02-21 21:17:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions.
[2021-02-21 21:17:40,759 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21
[2021-02-21 21:17:40,759 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-21 21:17:40,759 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions.
[2021-02-21 21:17:40,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2021-02-21 21:17:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions.
[2021-02-21 21:17:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2021-02-21 21:17:40,761 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 21:17:40,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-21 21:17:40,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-21 21:17:40,762 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 21:17:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 21:17:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1998187328, now seen corresponding path program 1 times
[2021-02-21 21:17:40,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 21:17:40,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643766570]
[2021-02-21 21:17:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 21:17:40,767 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-21 21:17:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:17:40,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:40,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:40,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:40,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9
[2021-02-21 21:17:40,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:40,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-21 21:17:40,907 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:40,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-21 21:17:40,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:40,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:40,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-21 21:17:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:17:40,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:40,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-21 21:17:40,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643766570]
[2021-02-21 21:17:40,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-21 21:17:40,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2021-02-21 21:17:40,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745009251]
[2021-02-21 21:17:40,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states
[2021-02-21 21:17:41,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-21 21:17:41,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-02-21 21:17:41,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2021-02-21 21:17:41,001 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states.
[2021-02-21 21:17:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-21 21:17:41,300 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions.
[2021-02-21 21:17:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-02-21 21:17:41,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21
[2021-02-21 21:17:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-21 21:17:41,305 INFO L225 Difference]: With dead ends: 38
[2021-02-21 21:17:41,305 INFO L226 Difference]: Without dead ends: 33
[2021-02-21 21:17:41,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2021-02-21 21:17:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2021-02-21 21:17:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32.
[2021-02-21 21:17:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2021-02-21 21:17:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions.
[2021-02-21 21:17:41,339 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21
[2021-02-21 21:17:41,339 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-21 21:17:41,339 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions.
[2021-02-21 21:17:41,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2021-02-21 21:17:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions.
[2021-02-21 21:17:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2021-02-21 21:17:41,343 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 21:17:41,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-21 21:17:41,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-21 21:17:41,344 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 21:17:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 21:17:41,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1751069704, now seen corresponding path program 1 times
[2021-02-21 21:17:41,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 21:17:41,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186698919]
[2021-02-21 21:17:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 21:17:43,548 WARN L141 QuantifierPusher]: treesize reduction 67, result has 59.9 percent of original size
[2021-02-21 21:17:43,584 WARN L147 QuantifierPusher]: treesize reduction 67, result has 59.9 percent of original size 100
[2021-02-21 21:17:43,585 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE
[2021-02-21 21:17:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:17:43,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:43,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 21:17:43,685 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size
[2021-02-21 21:17:43,686 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7
[2021-02-21 21:17:43,698 WARN L141 QuantifierPusher]: treesize reduction 48, result has 34.2 percent of original size
[2021-02-21 21:17:43,700 WARN L147 QuantifierPusher]: treesize reduction 48, result has 34.2 percent of original size 25
[2021-02-21 21:17:43,721 WARN L141 QuantifierPusher]: treesize reduction 41, result has 29.3 percent of original size
[2021-02-21 21:17:43,723 WARN L147 QuantifierPusher]: treesize reduction 41, result has 29.3 percent of original size 17
[2021-02-21 21:17:43,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-21 21:17:43,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-21 21:17:43,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:43,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-21 21:17:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 21:17:43,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-21 21:17:43,799 WARN L141 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size
[2021-02-21 21:17:43,804 WARN L159 QuantifierPusher]: Ignoring assumption.
[2021-02-21 21:17:43,805 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,806 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10
[2021-02-21 21:17:43,810 WARN L159 QuantifierPusher]: Ignoring assumption.
[2021-02-21 21:17:43,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-02-21 21:17:43,817 WARN L147 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size 157
[2021-02-21 21:17:43,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,997 WARN L159 QuantifierPusher]: Ignoring assumption.
[2021-02-21 21:17:43,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:43,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-02-21 21:17:44,001 WARN L159 QuantifierPusher]: Ignoring assumption.
[2021-02-21 21:17:44,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:44,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10
[2021-02-21 21:17:44,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90
[2021-02-21 21:17:44,112 WARN L141 QuantifierPusher]: treesize reduction 3, result has 94.5 percent of original size
[2021-02-21 21:17:44,114 WARN L147 QuantifierPusher]: treesize reduction 3, result has 94.5 percent of original size 52
[2021-02-21 21:17:44,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:44,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58
[2021-02-21 21:17:44,261 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:44,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55
[2021-02-21 21:17:44,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:44,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61
[2021-02-21 21:17:44,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:44,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58
[2021-02-21 21:17:44,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 21:17:44,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 21:17:44,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186698919]
[2021-02-21 21:17:44,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-21 21:17:44,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14
[2021-02-21 21:17:44,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469527334]
[2021-02-21 21:17:44,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states
[2021-02-21 21:17:44,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-21 21:17:44,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2021-02-21 21:17:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240
[2021-02-21 21:17:44,523 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 14 states.
[2021-02-21 21:17:45,349 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55
[2021-02-21 21:17:45,489 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58
[2021-02-21 21:17:45,657 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58
[2021-02-21 21:17:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-21 21:17:45,775 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions.
[2021-02-21 21:17:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2021-02-21 21:17:45,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27
[2021-02-21 21:17:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-21 21:17:45,779 INFO L225 Difference]: With dead ends: 57
[2021-02-21 21:17:45,780 INFO L226 Difference]: Without dead ends: 38
[2021-02-21 21:17:45,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756
[2021-02-21 21:17:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2021-02-21 21:17:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35.
[2021-02-21 21:17:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2021-02-21 21:17:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions.
[2021-02-21 21:17:45,805 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27
[2021-02-21 21:17:45,806 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-21 21:17:45,806 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions.
[2021-02-21 21:17:45,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states.
[2021-02-21 21:17:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions.
[2021-02-21 21:17:45,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2021-02-21 21:17:45,809 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 21:17:45,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-21 21:17:45,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-02-21 21:17:45,810 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 21:17:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 21:17:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash -702778622, now seen corresponding path program 1 times
[2021-02-21 21:17:45,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-21 21:17:45,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202366781]
[2021-02-21 21:17:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 21:17:47,917 WARN L141 QuantifierPusher]: treesize reduction 67, result has 59.9 percent of original size
[2021-02-21 21:17:47,930 WARN L147 QuantifierPusher]: treesize reduction 67, result has 59.9 percent of original size 100
[2021-02-21 21:17:49,990 WARN L141 QuantifierPusher]: treesize reduction 48, result has 61.3 percent of original size
[2021-02-21 21:17:49,999 WARN L147 QuantifierPusher]: treesize reduction 48, result has 61.3 percent of original size 76
[2021-02-21 21:17:50,000 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2021-02-21 21:17:52,099 WARN L141 QuantifierPusher]: treesize reduction 64, result has 60.2 percent of original size
[2021-02-21 21:17:52,104 WARN L147 QuantifierPusher]: treesize reduction 64, result has 60.2 percent of original size 97
[2021-02-21 21:17:52,105 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION
[2021-02-21 21:17:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 21:17:52,148 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 21:17:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 21:17:52,174 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 21:17:52,199 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2021-02-21 21:17:52,200 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2021-02-21 21:17:52,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-02-21 21:17:52,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:17:52 BoogieIcfgContainer
[2021-02-21 21:17:52,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-21 21:17:52,217 INFO L168 Benchmark]: Toolchain (without parser) took 13025.02 ms. Allocated memory was 155.2 MB in the beginning and 200.3 MB in the end (delta: 45.1 MB). Free memory was 131.7 MB in the beginning and 78.2 MB in the end (delta: 53.5 MB). Peak memory consumption was 99.6 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:52,218 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 155.2 MB. Free memory was 130.3 MB in the beginning and 130.3 MB in the end (delta: 80.5 kB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-21 21:17:52,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.03 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 120.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:52,219 INFO L168 Benchmark]: Boogie Preprocessor took 41.99 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 119.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:52,220 INFO L168 Benchmark]: RCFGBuilder took 481.10 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 136.9 MB in the end (delta: -17.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:52,221 INFO L168 Benchmark]: TraceAbstraction took 12221.66 ms. Allocated memory was 155.2 MB in the beginning and 200.3 MB in the end (delta: 45.1 MB). Free memory was 136.4 MB in the beginning and 78.2 MB in the end (delta: 58.2 MB). Peak memory consumption was 104.3 MB. Max. memory is 8.0 GB.
[2021-02-21 21:17:52,225 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.24 ms. Allocated memory is still 155.2 MB. Free memory was 130.3 MB in the beginning and 130.3 MB in the end (delta: 80.5 kB). There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 259.03 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 120.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 41.99 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 119.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 481.10 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 136.9 MB in the end (delta: -17.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 12221.66 ms. Allocated memory was 155.2 MB in the beginning and 200.3 MB in the end (delta: 45.1 MB). Free memory was 136.4 MB in the beginning and 78.2 MB in the end (delta: 58.2 MB). Peak memory consumption was 104.3 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 16]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L23] int i, n=__VERIFIER_nondet_uint(), sn=0;
[L23] int i, n=__VERIFIER_nondet_uint(), sn=0;
[L24] i=1
[L24] COND TRUE i<=n
[L25] COND TRUE i<10
[L26] sn = sn + (2)
[L24] i++
[L24] COND TRUE i<=n
[L25] COND FALSE !(i<10)
[L24] i++
[L24] COND FALSE !(i<=n)
[L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0)
[L15] COND TRUE !(cond)
[L16] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 78 SDtfs, 102 SDslu, 104 SDs, 0 SdLazy, 200 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 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 proved your program to be incorrect!
Received shutdown request...