/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound20.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-05-01 08:24:31,140 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-01 08:24:31,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-01 08:24:31,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-01 08:24:31,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-01 08:24:31,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-01 08:24:31,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-05-01 08:24:31,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
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[2021-05-01 08:24:31,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-01 08:24:31,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-01 08:24:31,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-01 08:24:31,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-01 08:24:31,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-01 08:24:31,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-01 08:24:31,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-01 08:24:31,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-01 08:24:31,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-01 08:24:31,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-05-01 08:24:31,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-05-01 08:24:31,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-05-01 08:24:31,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf
[2021-05-01 08:24:31,242 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-01 08:24:31,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-01 08:24:31,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-01 08:24:31,243 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-01 08:24:31,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-01 08:24:31,244 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-01 08:24:31,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-01 08:24:31,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-01 08:24:31,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-01 08:24:31,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-01 08:24:31,244 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-01 08:24:31,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-01 08:24:31,244 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-01 08:24:31,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-01 08:24:31,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-01 08:24:31,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-01 08:24:31,245 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-05-01 08:24:31,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-01 08:24:31,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:24:31,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-01 08:24:31,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-01 08:24:31,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-01 08:24:31,246 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-01 08:24:31,246 INFO L138 SettingsManager]: * Use separate solver for trace checks=false
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-05-01 08:24:31,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-01 08:24:31,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-01 08:24:31,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-01 08:24:31,503 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-01 08:24:31,503 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-01 08:24:31,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound20.c
[2021-05-01 08:24:31,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e8e9f318/b180a1e7cd57428a8b1a5d09e6117cba/FLAG35e7237e8
[2021-05-01 08:24:31,872 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-01 08:24:31,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound20.c
[2021-05-01 08:24:31,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e8e9f318/b180a1e7cd57428a8b1a5d09e6117cba/FLAG35e7237e8
[2021-05-01 08:24:32,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e8e9f318/b180a1e7cd57428a8b1a5d09e6117cba
[2021-05-01 08:24:32,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-01 08:24:32,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-01 08:24:32,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-01 08:24:32,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-01 08:24:32,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-01 08:24:32,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:32" (1/1) ...
[2021-05-01 08:24:32,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e8dd97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32, skipping insertion in model container
[2021-05-01 08:24:32,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:32" (1/1) ...
[2021-05-01 08:24:32,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-01 08:24:32,331 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-01 08:24:32,429 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound20.c[545,558]
[2021-05-01 08:24:32,452 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:24:32,458 INFO L203 MainTranslator]: Completed pre-run
[2021-05-01 08:24:32,476 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound20.c[545,558]
[2021-05-01 08:24:32,486 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:24:32,497 INFO L208 MainTranslator]: Completed translation
[2021-05-01 08:24:32,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32 WrapperNode
[2021-05-01 08:24:32,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-01 08:24:32,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-01 08:24:32,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-01 08:24:32,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-01 08:24:32,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32" (1/1) ...
[2021-05-01 08:24:32,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32" (1/1) ...
[2021-05-01 08:24:32,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32" (1/1) ...
[2021-05-01 08:24:32,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32" (1/1) ...
[2021-05-01 08:24:32,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32" (1/1) ...
[2021-05-01 08:24:32,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32" (1/1) ...
[2021-05-01 08:24:32,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32" (1/1) ...
[2021-05-01 08:24:32,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-01 08:24:32,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-01 08:24:32,570 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-01 08:24:32,570 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-01 08:24:32,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:24:32,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-01 08:24:32,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-01 08:24:32,625 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-01 08:24:32,625 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-01 08:24:32,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-01 08:24:32,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-01 08:24:32,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-01 08:24:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-01 08:24:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-01 08:24:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-01 08:24:32,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int
[2021-05-01 08:24:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-01 08:24:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-01 08:24:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-01 08:24:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-01 08:24:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-01 08:24:32,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-01 08:24:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-01 08:24:32,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-01 08:24:32,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-01 08:24:32,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-01 08:24:32,917 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-05-01 08:24:32,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:32 BoogieIcfgContainer
[2021-05-01 08:24:32,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-01 08:24:32,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-01 08:24:32,919 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-01 08:24:32,921 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-01 08:24:32,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:32" (1/3) ...
[2021-05-01 08:24:32,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12bdb7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:32, skipping insertion in model container
[2021-05-01 08:24:32,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:32" (2/3) ...
[2021-05-01 08:24:32,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12bdb7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:32, skipping insertion in model container
[2021-05-01 08:24:32,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:32" (3/3) ...
[2021-05-01 08:24:32,924 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound20.c
[2021-05-01 08:24:32,928 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-01 08:24:32,931 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-01 08:24:32,943 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-01 08:24:32,966 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-01 08:24:32,967 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-01 08:24:32,967 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-01 08:24:32,967 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-01 08:24:32,967 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-01 08:24:32,967 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-01 08:24:32,967 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-01 08:24:32,967 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-01 08:24:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2021-05-01 08:24:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2021-05-01 08:24:32,992 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:24:32,993 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:24:32,993 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:24:32,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:24:32,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times
[2021-05-01 08:24:33,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:24:33,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902348480]
[2021-05-01 08:24:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:24:33,054 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:24:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:33,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:24:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:33,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:24:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:33,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2021-05-01 08:24:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:33,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2021-05-01 08:24:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:33,252 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2021-05-01 08:24:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:33,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:33,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2021-05-01 08:24:33,260 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:24:33,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902348480]
[2021-05-01 08:24:33,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1902348480] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:24:33,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:24:33,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-01 08:24:33,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816719143]
[2021-05-01 08:24:33,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-01 08:24:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:24:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-01 08:24:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:24:33,274 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2021-05-01 08:24:33,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:24:33,380 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions.
[2021-05-01 08:24:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-01 08:24:33,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32
[2021-05-01 08:24:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:24:33,386 INFO L225 Difference]: With dead ends: 58
[2021-05-01 08:24:33,387 INFO L226 Difference]: Without dead ends: 28
[2021-05-01 08:24:33,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:24:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2021-05-01 08:24:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27.
[2021-05-01 08:24:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2021-05-01 08:24:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions.
[2021-05-01 08:24:33,418 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32
[2021-05-01 08:24:33,419 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:24:33,419 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions.
[2021-05-01 08:24:33,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2021-05-01 08:24:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions.
[2021-05-01 08:24:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-05-01 08:24:33,420 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:24:33,421 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:24:33,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-01 08:24:33,421 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:24:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:24:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times
[2021-05-01 08:24:33,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:24:33,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087644483]
[2021-05-01 08:24:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:24:33,424 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:24:33,439 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-01 08:24:33,439 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-05-01 08:24:33,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-01 08:24:33,452 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-01 08:24:33,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:33 BoogieIcfgContainer
[2021-05-01 08:24:33,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-01 08:24:33,454 INFO L168 Benchmark]: Toolchain (without parser) took 1151.71 ms. Allocated memory is still 211.8 MB. Free memory was 177.8 MB in the beginning and 136.2 MB in the end (delta: 41.6 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:33,454 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 211.8 MB. Free memory is still 194.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:24:33,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 194.53 ms. Allocated memory is still 211.8 MB. Free memory was 177.5 MB in the beginning and 167.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:33,455 INFO L168 Benchmark]: Boogie Preprocessor took 70.31 ms. Allocated memory is still 211.8 MB. Free memory was 167.7 MB in the beginning and 195.2 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:33,455 INFO L168 Benchmark]: RCFGBuilder took 348.09 ms. Allocated memory is still 211.8 MB. Free memory was 194.9 MB in the beginning and 179.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:33,456 INFO L168 Benchmark]: TraceAbstraction took 533.40 ms. Allocated memory is still 211.8 MB. Free memory was 178.8 MB in the beginning and 136.2 MB in the end (delta: 42.6 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:33,457 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.09 ms. Allocated memory is still 211.8 MB. Free memory is still 194.2 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 194.53 ms. Allocated memory is still 211.8 MB. Free memory was 177.5 MB in the beginning and 167.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 70.31 ms. Allocated memory is still 211.8 MB. Free memory was 167.7 MB in the beginning and 195.2 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 348.09 ms. Allocated memory is still 211.8 MB. Free memory was 194.9 MB in the beginning and 179.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 533.40 ms. Allocated memory is still 211.8 MB. Free memory was 178.8 MB in the beginning and 136.2 MB in the end (delta: 42.6 MB). Peak memory consumption was 41.9 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable
Unable to prove that call to reach_error is unreachable
Reason: unable to decide satisfiability of path constraint.
Possible FailurePath:
[L19] int counter = 0;
[L21] unsigned a, b;
[L22] unsigned x, y, u, v;
[L23] a = __VERIFIER_nondet_unsigned_int()
[L24] b = __VERIFIER_nondet_unsigned_int()
[L25] CALL assume_abort_if_not(a >= 1)
[L9] COND FALSE !(!cond)
[L25] RET assume_abort_if_not(a >= 1)
[L26] CALL assume_abort_if_not(b >= 1)
[L9] COND FALSE !(!cond)
[L26] RET assume_abort_if_not(b >= 1)
[L28] CALL assume_abort_if_not(a <= 65535)
[L9] COND FALSE !(!cond)
[L28] RET assume_abort_if_not(a <= 65535)
[L29] CALL assume_abort_if_not(b <= 65535)
[L9] COND FALSE !(!cond)
[L29] RET assume_abort_if_not(b <= 65535)
[L31] x = a
[L32] y = b
[L33] u = b
[L34] v = a
[L36] EXPR counter++
[L36] COND FALSE !(counter++<20)
[L51] CALL __VERIFIER_assert(x*u + y*v == 2*a*b)
[L12] COND TRUE !(cond)
[L14] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 478.4ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 16.5ms, AutomataDifference: 123.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 18 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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: 19.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces
Received shutdown request...