/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/freire2_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:07:42,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:07:42,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:07:42,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 08:07:42,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:07:42,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:07:42,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:07:42,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:07:42,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:07:42,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:07:42,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:07:42,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:07:42,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:07:42,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:07:42,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:07:42,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:07:42,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:07:42,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:07:42,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:07:42,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:07:42,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:07:42,069 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:07:42,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:07:42,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:07:42,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:07:42,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:07:42,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:07:42,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:07:42,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:07:42,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:07:42,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:07:42,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:07:42,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:07:42,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:07:42,072 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:07:42,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:07:42,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:07:42,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:07:42,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:07:42,464 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:07:42,466 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:07:42,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound100.c [2021-04-16 08:07:42,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8f16d00/f2fd83f661874067a742377701795cf4/FLAG5b2c6b847 [2021-04-16 08:07:42,939 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:07:42,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound100.c [2021-04-16 08:07:42,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8f16d00/f2fd83f661874067a742377701795cf4/FLAG5b2c6b847 [2021-04-16 08:07:42,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c8f16d00/f2fd83f661874067a742377701795cf4 [2021-04-16 08:07:42,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:07:42,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:07:42,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:07:42,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:07:42,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:07:42,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:07:42" (1/1) ... [2021-04-16 08:07:42,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3589c57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:42, skipping insertion in model container [2021-04-16 08:07:43,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:07:42" (1/1) ... [2021-04-16 08:07:43,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:07:43,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:07:43,167 WARN L226 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/freire2_unwindbound100.c[709,722] [2021-04-16 08:07:43,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:07:43,208 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:07:43,251 WARN L226 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/freire2_unwindbound100.c[709,722] [2021-04-16 08:07:43,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:07:43,291 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:07:43,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43 WrapperNode [2021-04-16 08:07:43,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:07:43,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:07:43,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:07:43,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:07:43,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43" (1/1) ... [2021-04-16 08:07:43,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43" (1/1) ... [2021-04-16 08:07:43,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43" (1/1) ... [2021-04-16 08:07:43,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43" (1/1) ... [2021-04-16 08:07:43,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43" (1/1) ... [2021-04-16 08:07:43,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43" (1/1) ... [2021-04-16 08:07:43,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43" (1/1) ... [2021-04-16 08:07:43,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:07:43,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:07:43,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:07:43,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:07:43,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:07:43,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:07:43,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:07:43,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:07:43,404 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:07:43,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:07:43,404 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:07:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:07:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:07:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:07:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:07:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-04-16 08:07:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:07:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:07:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:07:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:07:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:07:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:07:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:07:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:07:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:07:43,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:07:43,692 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 08:07:43,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:07:43 BoogieIcfgContainer [2021-04-16 08:07:43,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:07:43,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:07:43,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:07:43,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:07:43,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:07:42" (1/3) ... [2021-04-16 08:07:43,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260abdcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:07:43, skipping insertion in model container [2021-04-16 08:07:43,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:43" (2/3) ... [2021-04-16 08:07:43,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260abdcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:07:43, skipping insertion in model container [2021-04-16 08:07:43,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:07:43" (3/3) ... [2021-04-16 08:07:43,699 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound100.c [2021-04-16 08:07:43,710 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:07:43,713 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:07:43,747 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:07:43,761 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:07:43,761 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:07:43,761 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:07:43,761 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:07:43,761 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:07:43,761 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:07:43,761 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:07:43,761 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:07:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-04-16 08:07:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 08:07:43,779 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:07:43,780 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:07:43,780 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:07:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:07:43,791 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-04-16 08:07:43,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:07:43,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516140543] [2021-04-16 08:07:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:07:43,852 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:07:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:43,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:43,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:43,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:43,964 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:44,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:07:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:44,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:44,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 08:07:44,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516140543] [2021-04-16 08:07:44,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:07:44,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:07:44,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760280939] [2021-04-16 08:07:44,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:07:44,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:07:44,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:07:44,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:07:44,078 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 08:07:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:07:44,199 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-04-16 08:07:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:07:44,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-04-16 08:07:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:07:44,207 INFO L225 Difference]: With dead ends: 47 [2021-04-16 08:07:44,207 INFO L226 Difference]: Without dead ends: 22 [2021-04-16 08:07:44,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:07:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-04-16 08:07:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-04-16 08:07:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-04-16 08:07:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-04-16 08:07:44,244 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-04-16 08:07:44,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:07:44,245 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-04-16 08:07:44,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 08:07:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-04-16 08:07:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 08:07:44,246 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:07:44,246 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:07:44,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:07:44,247 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:07:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:07:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-04-16 08:07:44,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:07:44,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200392609] [2021-04-16 08:07:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:07:44,250 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:07:44,259 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:07:44,259 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:07:44,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:07:44,272 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:07:44,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:07:44 BoogieIcfgContainer [2021-04-16 08:07:44,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:07:44,274 INFO L168 Benchmark]: Toolchain (without parser) took 1294.36 ms. Allocated memory is still 176.2 MB. Free memory was 141.6 MB in the beginning and 105.7 MB in the end (delta: 35.9 MB). Peak memory consumption was 35.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:44,274 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 176.2 MB. Free memory was 158.1 MB in the beginning and 158.1 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:07:44,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.88 ms. Allocated memory is still 176.2 MB. Free memory was 141.4 MB in the beginning and 159.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:44,275 INFO L168 Benchmark]: Boogie Preprocessor took 42.42 ms. Allocated memory is still 176.2 MB. Free memory was 159.2 MB in the beginning and 157.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:44,275 INFO L168 Benchmark]: RCFGBuilder took 356.57 ms. Allocated memory is still 176.2 MB. Free memory was 157.6 MB in the beginning and 142.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:44,276 INFO L168 Benchmark]: TraceAbstraction took 578.18 ms. Allocated memory is still 176.2 MB. Free memory was 141.9 MB in the beginning and 105.7 MB in the end (delta: 36.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:44,277 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 was 158.1 MB in the beginning and 158.1 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 310.88 ms. Allocated memory is still 176.2 MB. Free memory was 141.4 MB in the beginning and 159.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.42 ms. Allocated memory is still 176.2 MB. Free memory was 159.2 MB in the beginning and 157.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 356.57 ms. Allocated memory is still 176.2 MB. Free memory was 157.6 MB in the beginning and 142.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 578.18 ms. Allocated memory is still 176.2 MB. Free memory was 141.9 MB in the beginning and 105.7 MB in the end (delta: 36.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: 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, overapproximation of to_int at line 45. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 [L33] EXPR counter++ [L33] COND FALSE !(counter++<100) [L45] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 503.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 9.6ms, AutomataDifference: 143.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 6 SDslu, 4 SDs, 0 SdLazy, 16 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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: 22.8ms 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...