/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-04-30 22:50:43,255 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-04-30 22:50:43,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-04-30 22:50:43,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-04-30 22:50:43,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-04-30 22:50:43,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-04-30 22:50:43,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-04-30 22:50:43,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-04-30 22:50:43,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-04-30 22:50:43,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-04-30 22:50:43,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-04-30 22:50:43,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
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[2021-04-30 22:50:43,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-04-30 22:50:43,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-04-30 22:50:43,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-04-30 22:50:43,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-04-30 22:50:43,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-04-30 22:50:43,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-04-30 22:50:43,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-04-30 22:50:43,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-04-30 22:50:43,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-04-30 22:50:43,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-04-30 22:50:43,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-04-30 22:50:43,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-04-30 22:50:43,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-04-30 22:50:43,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2021-04-30 22:50:43,326 INFO L113 SettingsManager]: Loading preferences was successful
[2021-04-30 22:50:43,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-04-30 22:50:43,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-04-30 22:50:43,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2021-04-30 22:50:43,328 INFO L138 SettingsManager]: * Use SBE=true
[2021-04-30 22:50:43,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-04-30 22:50:43,328 INFO L138 SettingsManager]: * sizeof long=4
[2021-04-30 22:50:43,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-04-30 22:50:43,328 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-04-30 22:50:43,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-04-30 22:50:43,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-04-30 22:50:43,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-04-30 22:50:43,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-04-30 22:50:43,329 INFO L138 SettingsManager]: * sizeof long double=12
[2021-04-30 22:50:43,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-04-30 22:50:43,329 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-04-30 22:50:43,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-04-30 22:50:43,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-04-30 22:50:43,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-04-30 22:50:43,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-04-30 22:50:43,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-04-30 22:50:43,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-04-30 22:50:43,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2021-04-30 22:50:43,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-04-30 22:50:43,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2021-04-30 22:50:43,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-04-30 22:50:43,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-04-30 22:50:43,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2021-04-30 22:50:43,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-04-30 22:50:43,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-04-30 22:50:43,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-04-30 22:50:43,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-04-30 22:50:43,592 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-04-30 22:50:43,592 INFO L275 PluginConnector]: CDTParser initialized
[2021-04-30 22:50:43,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c
[2021-04-30 22:50:43,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f117afeb/25356d82c1b546e485e9506f52216b89/FLAG238c13e28
[2021-04-30 22:50:43,978 INFO L306 CDTParser]: Found 1 translation units.
[2021-04-30 22:50:43,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c
[2021-04-30 22:50:43,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f117afeb/25356d82c1b546e485e9506f52216b89/FLAG238c13e28
[2021-04-30 22:50:43,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f117afeb/25356d82c1b546e485e9506f52216b89
[2021-04-30 22:50:43,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-04-30 22:50:44,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-04-30 22:50:44,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-04-30 22:50:44,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-04-30 22:50:44,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-04-30 22:50:44,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:50:43" (1/1) ...
[2021-04-30 22:50:44,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e1d8fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44, skipping insertion in model container
[2021-04-30 22:50:44,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:50:43" (1/1) ...
[2021-04-30 22:50:44,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-04-30 22:50:44,023 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-04-30 22:50:44,139 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c[333,346]
[2021-04-30 22:50:44,147 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-04-30 22:50:44,155 INFO L203 MainTranslator]: Completed pre-run
[2021-04-30 22:50:44,172 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c[333,346]
[2021-04-30 22:50:44,192 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-04-30 22:50:44,202 INFO L208 MainTranslator]: Completed translation
[2021-04-30 22:50:44,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44 WrapperNode
[2021-04-30 22:50:44,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-04-30 22:50:44,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-04-30 22:50:44,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-04-30 22:50:44,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-04-30 22:50:44,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44" (1/1) ...
[2021-04-30 22:50:44,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44" (1/1) ...
[2021-04-30 22:50:44,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44" (1/1) ...
[2021-04-30 22:50:44,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44" (1/1) ...
[2021-04-30 22:50:44,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44" (1/1) ...
[2021-04-30 22:50:44,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44" (1/1) ...
[2021-04-30 22:50:44,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44" (1/1) ...
[2021-04-30 22:50:44,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-04-30 22:50:44,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-04-30 22:50:44,229 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-04-30 22:50:44,230 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-04-30 22:50:44,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44" (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
[2021-04-30 22:50:44,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-04-30 22:50:44,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-04-30 22:50:44,278 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-04-30 22:50:44,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-04-30 22:50:44,279 INFO L138 BoogieDeclarations]: Found implementation of procedure eval
[2021-04-30 22:50:44,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-04-30 22:50:44,279 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-04-30 22:50:44,279 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-04-30 22:50:44,279 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-04-30 22:50:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-04-30 22:50:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-04-30 22:50:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure eval
[2021-04-30 22:50:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-04-30 22:50:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-04-30 22:50:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-04-30 22:50:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-04-30 22:50:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-04-30 22:50:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-04-30 22:50:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-04-30 22:50:44,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-04-30 22:50:44,481 INFO L299 CfgBuilder]: Removed 2 assume(true) statements.
[2021-04-30 22:50:44,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:50:44 BoogieIcfgContainer
[2021-04-30 22:50:44,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-04-30 22:50:44,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-04-30 22:50:44,484 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-04-30 22:50:44,486 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-04-30 22:50:44,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.04 10:50:43" (1/3) ...
[2021-04-30 22:50:44,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769b6c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:50:44, skipping insertion in model container
[2021-04-30 22:50:44,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:50:44" (2/3) ...
[2021-04-30 22:50:44,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769b6c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:50:44, skipping insertion in model container
[2021-04-30 22:50:44,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:50:44" (3/3) ...
[2021-04-30 22:50:44,488 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c
[2021-04-30 22:50:44,491 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-04-30 22:50:44,494 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-04-30 22:50:44,517 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-04-30 22:50:44,540 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-04-30 22:50:44,540 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-04-30 22:50:44,540 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP
[2021-04-30 22:50:44,541 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-04-30 22:50:44,541 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-04-30 22:50:44,541 INFO L381 AbstractCegarLoop]: Difference is false
[2021-04-30 22:50:44,541 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-04-30 22:50:44,541 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-04-30 22:50:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)
[2021-04-30 22:50:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2021-04-30 22:50:44,569 INFO L511 BasicCegarLoop]: Found error trace
[2021-04-30 22:50:44,570 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-04-30 22:50:44,570 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-04-30 22:50:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-04-30 22:50:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1499484955, now seen corresponding path program 1 times
[2021-04-30 22:50:44,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-04-30 22:50:44,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673851361]
[2021-04-30 22:50:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-04-30 22:50:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-04-30 22:50:44,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-04-30 22:50:44,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-04-30 22:50:44,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-04-30 22:50:44,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-04-30 22:50:44,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-04-30 22:50:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-04-30 22:50:44,734 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-04-30 22:50:44,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-04-30 22:50:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-04-30 22:50:44,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-04-30 22:50:44,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673851361]
[2021-04-30 22:50:44,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673851361] provided 1 perfect and 0 imperfect interpolant sequences
[2021-04-30 22:50:44,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-04-30 22:50:44,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-04-30 22:50:44,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364221065]
[2021-04-30 22:50:44,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-04-30 22:50:44,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-04-30 22:50:44,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-04-30 22:50:44,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-04-30 22:50:44,756 INFO L87 Difference]: Start difference. First operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-04-30 22:50:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-04-30 22:50:44,809 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions.
[2021-04-30 22:50:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-04-30 22:50:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10
[2021-04-30 22:50:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-04-30 22:50:44,815 INFO L225 Difference]: With dead ends: 37
[2021-04-30 22:50:44,815 INFO L226 Difference]: Without dead ends: 19
[2021-04-30 22:50:44,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-04-30 22:50:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2021-04-30 22:50:44,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17.
[2021-04-30 22:50:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2021-04-30 22:50:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions.
[2021-04-30 22:50:44,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10
[2021-04-30 22:50:44,845 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-04-30 22:50:44,845 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions.
[2021-04-30 22:50:44,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-04-30 22:50:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions.
[2021-04-30 22:50:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2021-04-30 22:50:44,846 INFO L511 BasicCegarLoop]: Found error trace
[2021-04-30 22:50:44,846 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-04-30 22:50:44,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-04-30 22:50:44,847 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-04-30 22:50:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-04-30 22:50:44,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1713498874, now seen corresponding path program 1 times
[2021-04-30 22:50:44,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-04-30 22:50:44,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730732978]
[2021-04-30 22:50:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-04-30 22:50:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-04-30 22:50:44,894 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-04-30 22:50:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-04-30 22:50:44,915 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-04-30 22:50:44,930 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2021-04-30 22:50:44,930 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-04-30 22:50:44,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-04-30 22:50:44,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.04 10:50:44 BoogieIcfgContainer
[2021-04-30 22:50:44,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-04-30 22:50:44,952 INFO L168 Benchmark]: Toolchain (without parser) took 950.97 ms. Allocated memory is still 208.7 MB. Free memory was 173.1 MB in the beginning and 144.4 MB in the end (delta: 28.7 MB). Peak memory consumption was 28.6 MB. Max. memory is 8.0 GB.
[2021-04-30 22:50:44,952 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 208.7 MB. Free memory is still 189.7 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-04-30 22:50:44,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.49 ms. Allocated memory is still 208.7 MB. Free memory was 172.9 MB in the beginning and 191.6 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB.
[2021-04-30 22:50:44,953 INFO L168 Benchmark]: Boogie Preprocessor took 25.33 ms. Allocated memory is still 208.7 MB. Free memory was 191.6 MB in the beginning and 190.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
[2021-04-30 22:50:44,954 INFO L168 Benchmark]: RCFGBuilder took 253.30 ms. Allocated memory is still 208.7 MB. Free memory was 190.0 MB in the beginning and 176.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB.
[2021-04-30 22:50:44,954 INFO L168 Benchmark]: TraceAbstraction took 467.12 ms. Allocated memory is still 208.7 MB. Free memory was 176.4 MB in the beginning and 144.4 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB.
[2021-04-30 22:50:44,956 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.13 ms. Allocated memory is still 208.7 MB. Free memory is still 189.7 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 199.49 ms. Allocated memory is still 208.7 MB. Free memory was 172.9 MB in the beginning and 191.6 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 25.33 ms. Allocated memory is still 208.7 MB. Free memory was 191.6 MB in the beginning and 190.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 253.30 ms. Allocated memory is still 208.7 MB. Free memory was 190.0 MB in the beginning and 176.9 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 467.12 ms. Allocated memory is still 208.7 MB. Free memory was 176.4 MB in the beginning and 144.4 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 7]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L12] int x=0;
VAL [\old(x)=53, x=0]
[L26] COND TRUE 1
VAL [\old(x)=0, x=0]
[L28] CALL eval()
VAL [\old(x)=0, x=0]
[L16] COND TRUE 1
[L17] x=1
VAL [\old(x)=0, x=1]
[L28] RET eval()
VAL [\old(x)=0, x=1]
[L29] CALL __VERIFIER_assert(x==0)
VAL [\old(cond)=0, \old(x)=0, x=1]
[L6] COND TRUE !(cond)
VAL [\old(cond)=0, \old(x)=0, cond=0, x=1]
[L7] reach_error()
VAL [\old(cond)=0, \old(x)=0, cond=0, x=1]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 392.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 21.4ms, AutomataDifference: 74.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 6 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.1ms AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 12.0ms SsaConstructionTime, 56.3ms SatisfiabilityAnalysisTime, 74.3ms InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 42 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...