/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-2.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-22 01:57:55,420 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-02-22 01:57:55,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
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[2021-02-22 01:57:55,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-22 01:57:55,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2021-02-22 01:57:55,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf
[2021-02-22 01:57:55,568 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-22 01:57:55,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-22 01:57:55,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-22 01:57:55,573 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-22 01:57:55,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-22 01:57:55,574 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-22 01:57:55,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-22 01:57:55,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-22 01:57:55,575 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-22 01:57:55,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-22 01:57:55,577 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-22 01:57:55,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-22 01:57:55,577 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-22 01:57:55,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-22 01:57:55,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-22 01:57:55,578 INFO L138 SettingsManager]: * Size of a code block=SingleStatement
[2021-02-22 01:57:55,578 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-02-22 01:57:55,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-22 01:57:55,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-22 01:57:55,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-22 01:57:55,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-02-22 01:57:55,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-22 01:57:55,580 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX
[2021-02-22 01:57:55,580 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-22 01:57:56,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-22 01:57:56,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-22 01:57:56,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-22 01:57:56,053 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-22 01:57:56,054 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-22 01:57:56,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c
[2021-02-22 01:57:56,144 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba936aa2/36b9b727505a404880aff8ac112b7903/FLAG368f39458
[2021-02-22 01:57:56,839 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-22 01:57:56,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c
[2021-02-22 01:57:56,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba936aa2/36b9b727505a404880aff8ac112b7903/FLAG368f39458
[2021-02-22 01:57:57,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ba936aa2/36b9b727505a404880aff8ac112b7903
[2021-02-22 01:57:57,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-22 01:57:57,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-22 01:57:57,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-22 01:57:57,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-22 01:57:57,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-22 01:57:57,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:57" (1/1) ...
[2021-02-22 01:57:57,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46bb0908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57, skipping insertion in model container
[2021-02-22 01:57:57,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:57" (1/1) ...
[2021-02-22 01:57:57,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-22 01:57:57,268 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-22 01:57:57,431 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c[576,589]
[2021-02-22 01:57:57,435 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 01:57:57,447 INFO L203 MainTranslator]: Completed pre-run
[2021-02-22 01:57:57,466 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c[576,589]
[2021-02-22 01:57:57,467 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-22 01:57:57,484 INFO L208 MainTranslator]: Completed translation
[2021-02-22 01:57:57,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57 WrapperNode
[2021-02-22 01:57:57,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-22 01:57:57,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-22 01:57:57,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-22 01:57:57,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-22 01:57:57,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57" (1/1) ...
[2021-02-22 01:57:57,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57" (1/1) ...
[2021-02-22 01:57:57,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57" (1/1) ...
[2021-02-22 01:57:57,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57" (1/1) ...
[2021-02-22 01:57:57,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57" (1/1) ...
[2021-02-22 01:57:57,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57" (1/1) ...
[2021-02-22 01:57:57,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57" (1/1) ...
[2021-02-22 01:57:57,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-22 01:57:57,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-22 01:57:57,526 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-22 01:57:57,527 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-22 01:57:57,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57" (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
[2021-02-22 01:57:57,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-22 01:57:57,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-22 01:57:57,649 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-22 01:57:57,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-22 01:57:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-22 01:57:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-22 01:57:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-22 01:57:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-22 01:57:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-02-22 01:57:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-22 01:57:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-22 01:57:57,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-22 01:57:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-22 01:57:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-22 01:57:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-22 01:57:57,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-22 01:57:58,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-22 01:57:58,170 INFO L299 CfgBuilder]: Removed 0 assume(true) statements.
[2021-02-22 01:57:58,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:58 BoogieIcfgContainer
[2021-02-22 01:57:58,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-22 01:57:58,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-22 01:57:58,174 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-22 01:57:58,178 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-22 01:57:58,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:57:57" (1/3) ...
[2021-02-22 01:57:58,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e3eab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:58, skipping insertion in model container
[2021-02-22 01:57:58,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:57" (2/3) ...
[2021-02-22 01:57:58,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e3eab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:58, skipping insertion in model container
[2021-02-22 01:57:58,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:58" (3/3) ...
[2021-02-22 01:57:58,182 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-2.c
[2021-02-22 01:57:58,190 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-02-22 01:57:58,195 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-02-22 01:57:58,220 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-02-22 01:57:58,266 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-22 01:57:58,266 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-22 01:57:58,266 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-02-22 01:57:58,266 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-22 01:57:58,267 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-22 01:57:58,267 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-22 01:57:58,267 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-22 01:57:58,267 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-22 01:57:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states.
[2021-02-22 01:57:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2021-02-22 01:57:58,313 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 01:57:58,314 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, 1, 1]
[2021-02-22 01:57:58,315 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 01:57:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 01:57:58,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1684913090, now seen corresponding path program 1 times
[2021-02-22 01:57:58,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 01:57:58,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74570593]
[2021-02-22 01:57:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 01:57:58,412 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 01:57:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:58,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:58,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:58,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:58,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-22 01:57:58,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:58,660 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7
[2021-02-22 01:57:58,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:58,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:58,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 01:57:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:58,722 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:58,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-22 01:57:58,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74570593]
[2021-02-22 01:57:58,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 01:57:58,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-02-22 01:57:58,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540575525]
[2021-02-22 01:57:58,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states
[2021-02-22 01:57:58,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 01:57:58,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-02-22 01:57:58,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-02-22 01:57:58,759 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 5 states.
[2021-02-22 01:57:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 01:57:58,919 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions.
[2021-02-22 01:57:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-02-22 01:57:58,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29
[2021-02-22 01:57:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 01:57:58,931 INFO L225 Difference]: With dead ends: 89
[2021-02-22 01:57:58,931 INFO L226 Difference]: Without dead ends: 46
[2021-02-22 01:57:58,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-02-22 01:57:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2021-02-22 01:57:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37.
[2021-02-22 01:57:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2021-02-22 01:57:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions.
[2021-02-22 01:57:58,982 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29
[2021-02-22 01:57:58,982 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 01:57:58,982 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions.
[2021-02-22 01:57:58,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2021-02-22 01:57:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions.
[2021-02-22 01:57:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2021-02-22 01:57:58,984 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 01:57:58,984 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, 1, 1]
[2021-02-22 01:57:58,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-22 01:57:58,985 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 01:57:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 01:57:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1911061662, now seen corresponding path program 1 times
[2021-02-22 01:57:58,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 01:57:58,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004120374]
[2021-02-22 01:57:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 01:57:58,990 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 01:57:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:59,094 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,095 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:59,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2
[2021-02-22 01:57:59,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:59,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 01:57:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:59,173 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,174 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-22 01:57:59,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004120374]
[2021-02-22 01:57:59,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 01:57:59,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-02-22 01:57:59,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045410337]
[2021-02-22 01:57:59,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states
[2021-02-22 01:57:59,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 01:57:59,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-02-22 01:57:59,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-02-22 01:57:59,187 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states.
[2021-02-22 01:57:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 01:57:59,303 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions.
[2021-02-22 01:57:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2021-02-22 01:57:59,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29
[2021-02-22 01:57:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 01:57:59,306 INFO L225 Difference]: With dead ends: 42
[2021-02-22 01:57:59,307 INFO L226 Difference]: Without dead ends: 37
[2021-02-22 01:57:59,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-02-22 01:57:59,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2021-02-22 01:57:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37.
[2021-02-22 01:57:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2021-02-22 01:57:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions.
[2021-02-22 01:57:59,340 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29
[2021-02-22 01:57:59,341 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 01:57:59,341 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions.
[2021-02-22 01:57:59,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2021-02-22 01:57:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions.
[2021-02-22 01:57:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2021-02-22 01:57:59,344 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 01:57:59,344 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, 1, 1, 1, 1]
[2021-02-22 01:57:59,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-22 01:57:59,345 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 01:57:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 01:57:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2041206465, now seen corresponding path program 1 times
[2021-02-22 01:57:59,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 01:57:59,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113407324]
[2021-02-22 01:57:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 01:57:59,354 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 01:57:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:59,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:59,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5
[2021-02-22 01:57:59,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-22 01:57:59,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8
[2021-02-22 01:57:59,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8
[2021-02-22 01:57:59,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4
[2021-02-22 01:57:59,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2
[2021-02-22 01:57:59,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:59,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 01:57:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:59,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-22 01:57:59,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113407324]
[2021-02-22 01:57:59,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 01:57:59,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2021-02-22 01:57:59,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035182103]
[2021-02-22 01:57:59,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states
[2021-02-22 01:57:59,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 01:57:59,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2021-02-22 01:57:59,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2021-02-22 01:57:59,551 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states.
[2021-02-22 01:57:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 01:57:59,746 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions.
[2021-02-22 01:57:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2021-02-22 01:57:59,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31
[2021-02-22 01:57:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 01:57:59,748 INFO L225 Difference]: With dead ends: 46
[2021-02-22 01:57:59,748 INFO L226 Difference]: Without dead ends: 32
[2021-02-22 01:57:59,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182
[2021-02-22 01:57:59,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2021-02-22 01:57:59,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2021-02-22 01:57:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2021-02-22 01:57:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 31 transitions.
[2021-02-22 01:57:59,758 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 31 transitions. Word has length 31
[2021-02-22 01:57:59,758 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 01:57:59,758 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 31 transitions.
[2021-02-22 01:57:59,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states.
[2021-02-22 01:57:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 31 transitions.
[2021-02-22 01:57:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2021-02-22 01:57:59,760 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-22 01:57:59,760 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, 1, 1, 1, 1]
[2021-02-22 01:57:59,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-02-22 01:57:59,761 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-22 01:57:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-22 01:57:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1860060673, now seen corresponding path program 1 times
[2021-02-22 01:57:59,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-02-22 01:57:59,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232306192]
[2021-02-22 01:57:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-22 01:57:59,765 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-02-22 01:57:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:59,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:59,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-22 01:57:59,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10
[2021-02-22 01:57:59,849 WARN L141 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size
[2021-02-22 01:57:59,851 WARN L147 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size 20
[2021-02-22 01:57:59,870 WARN L141 QuantifierPusher]: treesize reduction 16, result has 65.2 percent of original size
[2021-02-22 01:57:59,872 WARN L147 QuantifierPusher]: treesize reduction 16, result has 65.2 percent of original size 30
[2021-02-22 01:57:59,907 WARN L141 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size
[2021-02-22 01:57:59,908 WARN L147 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size 9
[2021-02-22 01:57:59,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-22 01:57:59,925 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,926 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2
[2021-02-22 01:57:59,934 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,935 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:57:59,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-22 01:57:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-22 01:57:59,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-22 01:57:59,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-22 01:58:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-22 01:58:00,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232306192]
[2021-02-22 01:58:00,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-22 01:58:00,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2021-02-22 01:58:00,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663623860]
[2021-02-22 01:58:00,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states
[2021-02-22 01:58:00,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-02-22 01:58:00,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2021-02-22 01:58:00,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90
[2021-02-22 01:58:00,005 INFO L87 Difference]: Start difference. First operand 32 states and 31 transitions. Second operand 10 states.
[2021-02-22 01:58:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-22 01:58:00,150 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions.
[2021-02-22 01:58:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2021-02-22 01:58:00,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31
[2021-02-22 01:58:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-22 01:58:00,151 INFO L225 Difference]: With dead ends: 32
[2021-02-22 01:58:00,151 INFO L226 Difference]: Without dead ends: 0
[2021-02-22 01:58:00,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210
[2021-02-22 01:58:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2021-02-22 01:58:00,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2021-02-22 01:58:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2021-02-22 01:58:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2021-02-22 01:58:00,153 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31
[2021-02-22 01:58:00,154 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-22 01:58:00,154 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2021-02-22 01:58:00,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2021-02-22 01:58:00,154 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2021-02-22 01:58:00,154 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2021-02-22 01:58:00,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-02-22 01:58:00,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2021-02-22 01:58:00,487 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed.
[2021-02-22 01:58:00,487 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed.
[2021-02-22 01:58:00,487 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed.
[2021-02-22 01:58:00,488 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true
[2021-02-22 01:58:00,488 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true
[2021-02-22 01:58:00,488 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true
[2021-02-22 01:58:00,488 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true
[2021-02-22 01:58:00,488 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true
[2021-02-22 01:58:00,489 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true
[2021-02-22 01:58:00,489 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|))
[2021-02-22 01:58:00,489 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true
[2021-02-22 01:58:00,489 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true
[2021-02-22 01:58:00,489 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true
[2021-02-22 01:58:00,490 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true
[2021-02-22 01:58:00,490 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true
[2021-02-22 01:58:00,490 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2021-02-22 01:58:00,490 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true
[2021-02-22 01:58:00,490 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 12 30) the Hoare annotation is: true
[2021-02-22 01:58:00,490 INFO L185 CegarLoopUtils]: At program point L23(lines 13 30) the Hoare annotation is: false
[2021-02-22 01:58:00,491 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))
[2021-02-22 01:58:00,491 INFO L185 CegarLoopUtils]: At program point L15-1(line 15) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))
[2021-02-22 01:58:00,491 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: false
[2021-02-22 01:58:00,491 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))
[2021-02-22 01:58:00,492 INFO L185 CegarLoopUtils]: At program point L20-1(lines 17 21) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) .cse1) (and .cse0 .cse1 (= |main_~#d1~0.base| main_~pd~0.base))))
[2021-02-22 01:58:00,492 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))
[2021-02-22 01:58:00,492 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))
[2021-02-22 01:58:00,492 INFO L185 CegarLoopUtils]: At program point L16-3(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))
[2021-02-22 01:58:00,493 INFO L185 CegarLoopUtils]: At program point L16-4(line 16) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_#t~ite8.offset| 0) (= |main_#t~ite8.base| |main_~#d2~0.base|) .cse1) (and (= |main_~#d1~0.offset| |main_#t~ite8.offset|) .cse0 (= |main_~#d1~0.base| |main_#t~ite8.base|) .cse1)))
[2021-02-22 01:58:00,493 INFO L185 CegarLoopUtils]: At program point L16-5(line 16) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_#t~ite8.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= |main_#t~ite8.base| |main_~#d2~0.base|) .cse1) (and (= |main_~#d1~0.offset| |main_#t~ite8.offset|) .cse0 (= |main_~#d1~0.offset| main_~pd~0.offset) (= |main_~#d1~0.base| |main_#t~ite8.base|) .cse1 (= |main_~#d1~0.base| main_~pd~0.base))))
[2021-02-22 01:58:00,493 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: false
[2021-02-22 01:58:00,494 INFO L185 CegarLoopUtils]: At program point L17(lines 17 21) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d1~0.offset| main_~pd~0.offset) .cse1 (= |main_~#d1~0.base| main_~pd~0.base)) (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) .cse1)))
[2021-02-22 01:58:00,494 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 12 30) the Hoare annotation is: true
[2021-02-22 01:58:00,494 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 28) the Hoare annotation is: false
[2021-02-22 01:58:00,494 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 12 30) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|))
[2021-02-22 01:58:00,494 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true
[2021-02-22 01:58:00,495 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) .cse1) (and .cse0 .cse1 (= |main_~#d1~0.base| main_~pd~0.base) (not |main_#t~short10|))))
[2021-02-22 01:58:00,495 INFO L185 CegarLoopUtils]: At program point L22-1(line 22) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))
[2021-02-22 01:58:00,495 INFO L185 CegarLoopUtils]: At program point L22-2(line 22) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (= |main_#t~mem9| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))
[2021-02-22 01:58:00,496 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d1~0.offset| main_~pd~0.offset) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)) (= |main_~#d1~0.base| main_~pd~0.base))
[2021-02-22 01:58:00,496 INFO L185 CegarLoopUtils]: At program point L22-4(lines 22 24) the Hoare annotation is: (not |main_#t~short10|)
[2021-02-22 01:58:00,496 INFO L185 CegarLoopUtils]: At program point L22-5(line 22) the Hoare annotation is: false
[2021-02-22 01:58:00,496 INFO L185 CegarLoopUtils]: At program point L22-6(line 22) the Hoare annotation is: false
[2021-02-22 01:58:00,496 INFO L192 CegarLoopUtils]: At program point L22-7(line 22) the Hoare annotation is: true
[2021-02-22 01:58:00,496 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (= (select |#valid| |main_~#d1~0.base|) 1)
[2021-02-22 01:58:00,497 INFO L192 CegarLoopUtils]: At program point L22-8(line 22) the Hoare annotation is: true
[2021-02-22 01:58:00,497 INFO L185 CegarLoopUtils]: At program point L14-1(line 14) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))
[2021-02-22 01:58:00,497 INFO L192 CegarLoopUtils]: At program point L14-2(line 14) the Hoare annotation is: true
[2021-02-22 01:58:00,497 INFO L192 CegarLoopUtils]: At program point L14-3(line 14) the Hoare annotation is: true
[2021-02-22 01:58:00,497 INFO L192 CegarLoopUtils]: At program point L14-4(line 14) the Hoare annotation is: true
[2021-02-22 01:58:00,497 INFO L192 CegarLoopUtils]: At program point L14-5(line 14) the Hoare annotation is: true
[2021-02-22 01:58:00,497 INFO L185 CegarLoopUtils]: At program point L14-6(line 14) the Hoare annotation is: false
[2021-02-22 01:58:00,498 INFO L185 CegarLoopUtils]: At program point L14-7(line 14) the Hoare annotation is: false
[2021-02-22 01:58:00,498 INFO L185 CegarLoopUtils]: At program point L14-8(line 14) the Hoare annotation is: false
[2021-02-22 01:58:00,498 INFO L185 CegarLoopUtils]: At program point L14-9(line 14) the Hoare annotation is: false
[2021-02-22 01:58:00,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:58:00 BoogieIcfgContainer
[2021-02-22 01:58:00,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-22 01:58:00,512 INFO L168 Benchmark]: Toolchain (without parser) took 3293.88 ms. Allocated memory was 151.0 MB in the beginning and 194.0 MB in the end (delta: 43.0 MB). Free memory was 127.8 MB in the beginning and 100.2 MB in the end (delta: 27.6 MB). Peak memory consumption was 71.2 MB. Max. memory is 8.0 GB.
[2021-02-22 01:58:00,513 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-22 01:58:00,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-22 01:58:00,514 INFO L168 Benchmark]: Boogie Preprocessor took 39.15 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-02-22 01:58:00,515 INFO L168 Benchmark]: RCFGBuilder took 645.89 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 130.2 MB in the end (delta: -14.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB.
[2021-02-22 01:58:00,516 INFO L168 Benchmark]: TraceAbstraction took 2337.00 ms. Allocated memory was 151.0 MB in the beginning and 194.0 MB in the end (delta: 43.0 MB). Free memory was 129.8 MB in the beginning and 100.2 MB in the end (delta: 29.6 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB.
[2021-02-22 01:58:00,519 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 248.69 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 116.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 39.15 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 645.89 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 130.2 MB in the end (delta: -14.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 2337.00 ms. Allocated memory was 151.0 MB in the beginning and 194.0 MB in the end (delta: 43.0 MB). Free memory was 129.8 MB in the beginning and 100.2 MB in the end (delta: 29.6 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 28]: call to reach_error is unreachable
For all program executions holds that call to reach_error is unreachable at this location
- AllSpecificationsHoldResult: All specifications hold
1 specifications checked. All of them hold
- InvariantResult [Line: 13]: Loop Invariant
Derived loop invariant: 0
- ProcedureContractResult [Line: 12]: Procedure Contract for main
Derived contract for procedure main: 1
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 88 SDslu, 291 SDs, 0 SdLazy, 251 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=0, 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, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 51 LocationsWithAnnotation, 51 PreInvPairs, 79 NumberOfFragments, 452 HoareAnnotationTreeSize, 51 FomulaSimplifications, 34 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 51 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, 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 correct!
Received shutdown request...