/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/geo1-ll_unwindbound20.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-1a84f73
[2021-05-01 08:23:20,471 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-05-01 08:23:20,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-05-01 08:23:20,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-05-01 08:23:20,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-05-01 08:23:20,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-05-01 08:23:20,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-05-01 08:23:20,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
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[2021-05-01 08:23:20,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-05-01 08:23:20,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-05-01 08:23:20,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-05-01 08:23:20,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-05-01 08:23:20,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-05-01 08:23:20,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-05-01 08:23:20,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-05-01 08:23:20,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-05-01 08:23:20,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-05-01 08:23:20,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2021-05-01 08:23:20,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-05-01 08:23:20,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-05-01 08:23:20,539 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 08:23:20,561 INFO L113 SettingsManager]: Loading preferences was successful
[2021-05-01 08:23:20,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-05-01 08:23:20,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-05-01 08:23:20,567 INFO L138 SettingsManager]: * sizeof long=4
[2021-05-01 08:23:20,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-05-01 08:23:20,567 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-05-01 08:23:20,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-05-01 08:23:20,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-05-01 08:23:20,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-05-01 08:23:20,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-05-01 08:23:20,569 INFO L138 SettingsManager]: * sizeof long double=12
[2021-05-01 08:23:20,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-05-01 08:23:20,569 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-05-01 08:23:20,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-05-01 08:23:20,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-05-01 08:23:20,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-05-01 08:23:20,569 INFO L138 SettingsManager]: * To the following directory=./dump/
[2021-05-01 08:23:20,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-05-01 08:23:20,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-05-01 08:23:20,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-05-01 08:23:20,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2021-05-01 08:23:20,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-05-01 08:23:20,570 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN
[2021-05-01 08:23:20,570 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-05-01 08:23:20,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-05-01 08:23:20,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-05-01 08:23:20,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-05-01 08:23:20,951 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-05-01 08:23:20,952 INFO L275 PluginConnector]: CDTParser initialized
[2021-05-01 08:23:20,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound20.c
[2021-05-01 08:23:21,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12e1d9a1/1651e27556204184a4ddcd1162e3c140/FLAGabe749434
[2021-05-01 08:23:21,486 INFO L306 CDTParser]: Found 1 translation units.
[2021-05-01 08:23:21,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound20.c
[2021-05-01 08:23:21,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12e1d9a1/1651e27556204184a4ddcd1162e3c140/FLAGabe749434
[2021-05-01 08:23:21,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12e1d9a1/1651e27556204184a4ddcd1162e3c140
[2021-05-01 08:23:21,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-05-01 08:23:21,885 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-05-01 08:23:21,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-05-01 08:23:21,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-05-01 08:23:21,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-05-01 08:23:21,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:23:21" (1/1) ...
[2021-05-01 08:23:21,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8d48e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:21, skipping insertion in model container
[2021-05-01 08:23:21,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:23:21" (1/1) ...
[2021-05-01 08:23:21,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-05-01 08:23:21,918 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-05-01 08:23:22,024 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/geo1-ll_unwindbound20.c[546,559]
[2021-05-01 08:23:22,037 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:23:22,045 INFO L203 MainTranslator]: Completed pre-run
[2021-05-01 08:23:22,056 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/geo1-ll_unwindbound20.c[546,559]
[2021-05-01 08:23:22,060 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-05-01 08:23:22,071 INFO L208 MainTranslator]: Completed translation
[2021-05-01 08:23:22,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22 WrapperNode
[2021-05-01 08:23:22,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-05-01 08:23:22,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-05-01 08:23:22,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-05-01 08:23:22,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-05-01 08:23:22,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22" (1/1) ...
[2021-05-01 08:23:22,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22" (1/1) ...
[2021-05-01 08:23:22,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22" (1/1) ...
[2021-05-01 08:23:22,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22" (1/1) ...
[2021-05-01 08:23:22,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22" (1/1) ...
[2021-05-01 08:23:22,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22" (1/1) ...
[2021-05-01 08:23:22,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22" (1/1) ...
[2021-05-01 08:23:22,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-05-01 08:23:22,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-05-01 08:23:22,148 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-05-01 08:23:22,148 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-05-01 08:23:22,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22" (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 08:23:22,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-05-01 08:23:22,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-05-01 08:23:22,239 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-05-01 08:23:22,240 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2021-05-01 08:23:22,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-05-01 08:23:22,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-05-01 08:23:22,240 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-05-01 08:23:22,240 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-05-01 08:23:22,240 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-05-01 08:23:22,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-05-01 08:23:22,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2021-05-01 08:23:22,241 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2021-05-01 08:23:22,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-05-01 08:23:22,241 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-05-01 08:23:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-05-01 08:23:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-05-01 08:23:22,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-05-01 08:23:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-05-01 08:23:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-05-01 08:23:22,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-05-01 08:23:22,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-05-01 08:23:22,569 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-05-01 08:23:22,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:22 BoogieIcfgContainer
[2021-05-01 08:23:22,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-05-01 08:23:22,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-05-01 08:23:22,572 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-05-01 08:23:22,575 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-05-01 08:23:22,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:23:21" (1/3) ...
[2021-05-01 08:23:22,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4c452b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:22, skipping insertion in model container
[2021-05-01 08:23:22,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:22" (2/3) ...
[2021-05-01 08:23:22,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b4c452b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:22, skipping insertion in model container
[2021-05-01 08:23:22,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:22" (3/3) ...
[2021-05-01 08:23:22,578 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound20.c
[2021-05-01 08:23:22,583 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2021-05-01 08:23:22,587 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2021-05-01 08:23:22,603 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-05-01 08:23:22,629 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-05-01 08:23:22,630 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-05-01 08:23:22,630 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2021-05-01 08:23:22,630 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-05-01 08:23:22,630 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-05-01 08:23:22,630 INFO L381 AbstractCegarLoop]: Difference is false
[2021-05-01 08:23:22,630 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-05-01 08:23:22,630 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-05-01 08:23:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2021-05-01 08:23:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-05-01 08:23:22,661 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:23:22,662 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:23:22,663 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:23:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:23:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash 730417173, now seen corresponding path program 1 times
[2021-05-01 08:23:22,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:23:22,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734172900]
[2021-05-01 08:23:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:23:22,740 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:23:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:23:22,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:23:22,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:23:22,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:23:22,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:23:22,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-05-01 08:23:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:23:22,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:23:22,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:23:23,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2021-05-01 08:23:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:23:23,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:23:23,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:23:23,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:23:23,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:23:23,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11
[2021-05-01 08:23:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-05-01 08:23:23,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:23:23,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:23:23,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-05-01 08:23:23,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-05-01 08:23:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-05-01 08:23:23,029 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace
[2021-05-01 08:23:23,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734172900]
[2021-05-01 08:23:23,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734172900] provided 1 perfect and 0 imperfect interpolant sequences
[2021-05-01 08:23:23,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-05-01 08:23:23,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-05-01 08:23:23,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934198630]
[2021-05-01 08:23:23,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states
[2021-05-01 08:23:23,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2021-05-01 08:23:23,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-05-01 08:23:23,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:23:23,054 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2021-05-01 08:23:23,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-05-01 08:23:23,214 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions.
[2021-05-01 08:23:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2021-05-01 08:23:23,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23
[2021-05-01 08:23:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-05-01 08:23:23,225 INFO L225 Difference]: With dead ends: 54
[2021-05-01 08:23:23,226 INFO L226 Difference]: Without dead ends: 26
[2021-05-01 08:23:23,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-05-01 08:23:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2021-05-01 08:23:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25.
[2021-05-01 08:23:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2021-05-01 08:23:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions.
[2021-05-01 08:23:23,288 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23
[2021-05-01 08:23:23,289 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-05-01 08:23:23,299 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions.
[2021-05-01 08:23:23,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)
[2021-05-01 08:23:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions.
[2021-05-01 08:23:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-05-01 08:23:23,302 INFO L511 BasicCegarLoop]: Found error trace
[2021-05-01 08:23:23,303 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-05-01 08:23:23,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-05-01 08:23:23,303 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-05-01 08:23:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-05-01 08:23:23,304 INFO L82 PathProgramCache]: Analyzing trace with hash -942473515, now seen corresponding path program 1 times
[2021-05-01 08:23:23,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2021-05-01 08:23:23,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143964431]
[2021-05-01 08:23:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-05-01 08:23:23,311 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation
[2021-05-01 08:23:23,331 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility
[2021-05-01 08:23:23,332 INFO L620 BasicCegarLoop]: Counterexample might be feasible
[2021-05-01 08:23:23,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-05-01 08:23:23,350 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2021-05-01 08:23:23,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:23:23 BoogieIcfgContainer
[2021-05-01 08:23:23,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-05-01 08:23:23,353 INFO L168 Benchmark]: Toolchain (without parser) took 1468.07 ms. Allocated memory is still 205.5 MB. Free memory was 171.3 MB in the beginning and 184.7 MB in the end (delta: -13.4 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:23:23,353 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 205.5 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:23:23,353 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.43 ms. Allocated memory is still 205.5 MB. Free memory was 171.1 MB in the beginning and 161.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-05-01 08:23:23,354 INFO L168 Benchmark]: Boogie Preprocessor took 73.52 ms. Allocated memory is still 205.5 MB. Free memory was 161.2 MB in the beginning and 188.9 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB.
[2021-05-01 08:23:23,354 INFO L168 Benchmark]: RCFGBuilder took 422.84 ms. Allocated memory is still 205.5 MB. Free memory was 188.9 MB in the beginning and 174.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB.
[2021-05-01 08:23:23,354 INFO L168 Benchmark]: TraceAbstraction took 779.55 ms. Allocated memory is still 205.5 MB. Free memory was 173.8 MB in the beginning and 184.7 MB in the end (delta: -10.9 MB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-05-01 08:23:23,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.11 ms. Allocated memory is still 205.5 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 184.43 ms. Allocated memory is still 205.5 MB. Free memory was 171.1 MB in the beginning and 161.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 73.52 ms. Allocated memory is still 205.5 MB. Free memory was 161.2 MB in the beginning and 188.9 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 422.84 ms. Allocated memory is still 205.5 MB. Free memory was 188.9 MB in the beginning and 174.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 779.55 ms. Allocated memory is still 205.5 MB. Free memory was 173.8 MB in the beginning and 184.7 MB in the end (delta: -10.9 MB). There was no memory consumed. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 18]: 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] int z, k;
[L25] long long x, y, c;
[L26] z = __VERIFIER_nondet_int()
[L27] k = __VERIFIER_nondet_int()
[L28] CALL assume_abort_if_not(z >= 1)
[L13] COND FALSE !(!cond)
[L28] RET assume_abort_if_not(z >= 1)
[L29] CALL assume_abort_if_not(k >= 1)
[L13] COND FALSE !(!cond)
[L29] RET assume_abort_if_not(k >= 1)
[L31] x = 1
[L32] y = z
[L33] c = 1
[L35] EXPR counter++
[L35] COND TRUE counter++<20
[L36] CALL __VERIFIER_assert(x*z - x - y + 1 == 0)
[L16] COND TRUE !(cond)
[L18] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 708.7ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 19.1ms, AutomataDifference: 189.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 15 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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: 45.1ms 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...