/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/lcm1_unwindbound50.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-05-01 08:24:24,148 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-01 08:24:24,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-01 08:24:24,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-01 08:24:24,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-01 08:24:24,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-01 08:24:24,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-05-01 08:24:24,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
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[2021-05-01 08:24:24,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
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[2021-05-01 08:24:24,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-01 08:24:24,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-01 08:24:24,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-01 08:24:24,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-01 08:24:24,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-01 08:24:24,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-01 08:24:24,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-01 08:24:24,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-01 08:24:24,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-01 08:24:24,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-05-01 08:24:24,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-05-01 08:24:24,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-05-01 08:24:24,304 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 08:24:24,322 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-01 08:24:24,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-01 08:24:24,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-01 08:24:24,330 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-01 08:24:24,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-01 08:24:24,330 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-01 08:24:24,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-01 08:24:24,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-01 08:24:24,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-01 08:24:24,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-01 08:24:24,333 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-01 08:24:24,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-01 08:24:24,333 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-01 08:24:24,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-01 08:24:24,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-01 08:24:24,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-01 08:24:24,334 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-05-01 08:24:24,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-01 08:24:24,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:24:24,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-01 08:24:24,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-01 08:24:24,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-01 08:24:24,335 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-01 08:24:24,335 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-05-01 08:24:24,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-01 08:24:24,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-01 08:24:24,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-01 08:24:24,765 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-01 08:24:24,766 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-01 08:24:24,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound50.c
[2021-05-01 08:24:24,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e3c8b823/eabc9aefe9ab400abb7e25b16dbd291e/FLAGee42f5004
[2021-05-01 08:24:25,446 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-01 08:24:25,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound50.c
[2021-05-01 08:24:25,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e3c8b823/eabc9aefe9ab400abb7e25b16dbd291e/FLAGee42f5004
[2021-05-01 08:24:25,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e3c8b823/eabc9aefe9ab400abb7e25b16dbd291e
[2021-05-01 08:24:25,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-01 08:24:25,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-01 08:24:25,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-01 08:24:25,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-01 08:24:25,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-01 08:24:25,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:25" (1/1) ...
[2021-05-01 08:24:25,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afc649d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:25, skipping insertion in model container
[2021-05-01 08:24:25,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:24:25" (1/1) ...
[2021-05-01 08:24:25,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-01 08:24:25,830 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-01 08:24:25,981 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/lcm1_unwindbound50.c[560,573]
[2021-05-01 08:24:26,000 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:24:26,008 INFO L203 MainTranslator]: Completed pre-run
[2021-05-01 08:24:26,030 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/lcm1_unwindbound50.c[560,573]
[2021-05-01 08:24:26,040 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:24:26,076 INFO L208 MainTranslator]: Completed translation
[2021-05-01 08:24:26,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26 WrapperNode
[2021-05-01 08:24:26,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-01 08:24:26,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-01 08:24:26,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-01 08:24:26,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-01 08:24:26,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26" (1/1) ...
[2021-05-01 08:24:26,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26" (1/1) ...
[2021-05-01 08:24:26,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26" (1/1) ...
[2021-05-01 08:24:26,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26" (1/1) ...
[2021-05-01 08:24:26,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26" (1/1) ...
[2021-05-01 08:24:26,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26" (1/1) ...
[2021-05-01 08:24:26,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26" (1/1) ...
[2021-05-01 08:24:26,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-01 08:24:26,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-01 08:24:26,124 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-01 08:24:26,124 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-01 08:24:26,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26" (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 08:24:26,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-01 08:24:26,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-01 08:24:26,207 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-01 08:24:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-01 08:24:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-01 08:24:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-01 08:24:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-01 08:24:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-01 08:24:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-01 08:24:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-01 08:24:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int
[2021-05-01 08:24:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-01 08:24:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-01 08:24:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-01 08:24:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-01 08:24:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-01 08:24:26,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-01 08:24:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-01 08:24:26,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-01 08:24:26,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-01 08:24:26,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-01 08:24:26,575 INFO L299 CfgBuilder]: Removed 3 assume(true) statements.
[2021-05-01 08:24:26,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:26 BoogieIcfgContainer
[2021-05-01 08:24:26,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-01 08:24:26,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-01 08:24:26,578 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-01 08:24:26,580 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-01 08:24:26,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:24:25" (1/3) ...
[2021-05-01 08:24:26,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ab92e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:26, skipping insertion in model container
[2021-05-01 08:24:26,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:24:26" (2/3) ...
[2021-05-01 08:24:26,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ab92e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:24:26, skipping insertion in model container
[2021-05-01 08:24:26,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:24:26" (3/3) ...
[2021-05-01 08:24:26,583 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound50.c
[2021-05-01 08:24:26,588 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-01 08:24:26,592 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-01 08:24:26,606 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-01 08:24:26,624 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-01 08:24:26,624 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-01 08:24:26,624 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-01 08:24:26,624 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-01 08:24:26,625 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-01 08:24:26,625 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-01 08:24:26,625 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-01 08:24:26,625 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-01 08:24:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2021-05-01 08:24:26,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2021-05-01 08:24:26,644 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:24:26,644 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 08:24:26,645 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:24:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:24:26,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1515787587, now seen corresponding path program 1 times
[2021-05-01 08:24:26,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:24:26,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417662096]
[2021-05-01 08:24:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:24:26,721 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:24:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:26,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:26,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:26,870 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:26,871 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:26,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:24:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:26,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:26,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:26,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:24:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:27,002 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:27,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:27,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:27,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:27,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2021-05-01 08:24:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:27,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:27,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:27,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:27,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:27,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16
[2021-05-01 08:24:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:27,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:27,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:27,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:27,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:27,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21
[2021-05-01 08:24:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:24:27,047 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:27,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:27,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:24:27,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:24:27,051 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 08:24:27,054 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:24:27,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417662096]
[2021-05-01 08:24:27,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417662096] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:24:27,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:24:27,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-01 08:24:27,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937064551]
[2021-05-01 08:24:27,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-01 08:24:27,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:24:27,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-01 08:24:27,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:24:27,076 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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 08:24:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:24:27,282 INFO L93 Difference]: Finished difference Result 74 states and 117 transitions.
[2021-05-01 08:24:27,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-01 08:24:27,284 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 08:24:27,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:24:27,300 INFO L225 Difference]: With dead ends: 74
[2021-05-01 08:24:27,300 INFO L226 Difference]: Without dead ends: 36
[2021-05-01 08:24:27,303 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:24:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2021-05-01 08:24:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35.
[2021-05-01 08:24:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2021-05-01 08:24:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions.
[2021-05-01 08:24:27,341 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 32
[2021-05-01 08:24:27,342 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:24:27,342 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions.
[2021-05-01 08:24:27,342 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 08:24:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions.
[2021-05-01 08:24:27,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2021-05-01 08:24:27,344 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:24:27,345 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 08:24:27,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-01 08:24:27,345 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:24:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:24:27,346 INFO L82 PathProgramCache]: Analyzing trace with hash 182383832, now seen corresponding path program 1 times
[2021-05-01 08:24:27,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:24:27,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074986895]
[2021-05-01 08:24:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:24:27,350 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:24:27,370 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-01 08:24:27,371 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-05-01 08:24:27,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-01 08:24:27,393 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-01 08:24:27,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:24:27 BoogieIcfgContainer
[2021-05-01 08:24:27,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-01 08:24:27,394 INFO L168 Benchmark]: Toolchain (without parser) took 1602.40 ms. Allocated memory is still 176.2 MB. Free memory was 141.4 MB in the beginning and 142.9 MB in the end (delta: -1.5 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:24:27,395 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 176.2 MB. Free memory is still 158.0 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:24:27,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.67 ms. Allocated memory is still 176.2 MB. Free memory was 141.2 MB in the beginning and 159.1 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:27,396 INFO L168 Benchmark]: Boogie Preprocessor took 44.86 ms. Allocated memory is still 176.2 MB. Free memory was 159.1 MB in the beginning and 157.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:27,397 INFO L168 Benchmark]: RCFGBuilder took 452.49 ms. Allocated memory is still 176.2 MB. Free memory was 157.7 MB in the beginning and 140.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
[2021-05-01 08:24:27,397 INFO L168 Benchmark]: TraceAbstraction took 815.64 ms. Allocated memory is still 176.2 MB. Free memory was 140.3 MB in the beginning and 142.9 MB in the end (delta: -2.6 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:24:27,399 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.25 ms. Allocated memory is still 176.2 MB. Free memory is still 158.0 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 282.67 ms. Allocated memory is still 176.2 MB. Free memory was 141.2 MB in the beginning and 159.1 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 44.86 ms. Allocated memory is still 176.2 MB. Free memory was 159.1 MB in the beginning and 157.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 452.49 ms. Allocated memory is still 176.2 MB. Free memory was 157.7 MB in the beginning and 140.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 815.64 ms. Allocated memory is still 176.2 MB. Free memory was 140.3 MB in the beginning and 142.9 MB in the end (delta: -2.6 MB). There was no memory consumed. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 17]: 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:
[L22] int counter = 0;
[L24] unsigned a, b;
[L25] unsigned x, y, u, v;
[L26] a = __VERIFIER_nondet_unsigned_int()
[L27] b = __VERIFIER_nondet_unsigned_int()
[L28] CALL assume_abort_if_not(a >= 1)
[L12] COND FALSE !(!cond)
[L28] RET assume_abort_if_not(a >= 1)
[L29] CALL assume_abort_if_not(b >= 1)
[L12] COND FALSE !(!cond)
[L29] RET assume_abort_if_not(b >= 1)
[L31] CALL assume_abort_if_not(a <= 65535)
[L12] COND FALSE !(!cond)
[L31] RET assume_abort_if_not(a <= 65535)
[L32] CALL assume_abort_if_not(b <= 65535)
[L12] COND FALSE !(!cond)
[L32] RET assume_abort_if_not(b <= 65535)
[L34] x = a
[L35] y = b
[L36] u = b
[L37] v = 0
[L39] EXPR counter++
[L39] COND FALSE !(counter++<50)
[L61] CALL __VERIFIER_assert(u*y + v*y == a*b)
[L15] COND TRUE !(cond)
[L17] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 754.6ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 11.9ms, AutomataDifference: 241.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 29 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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: 26.7ms 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...