/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:10:23,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:10:23,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:10:23,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:10:23,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:10:23,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:10:23,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:10:23,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:10:23,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:10:23,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:10:23,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:10:23,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:10:23,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:10:23,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:10:23,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:10:23,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:10:23,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:10:23,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:10:23,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:10:23,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:10:23,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:10:23,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:10:23,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:10:23,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:10:23,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:10:23,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:10:23,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:10:23,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:10:23,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:10:23,210 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:10:23,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:10:23,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:10:23,216 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:10:23,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:10:23,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:10:23,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:10:23,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:10:23,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:10:23,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:10:23,218 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:10:23,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:10:23,219 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:10:23,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:10:23,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:10:23,220 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:10:23,220 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:10:23,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:10:23,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:10:23,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:10:23,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:10:23,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:10:23,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:10:23,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:10:23,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:10:23,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:10:23,712 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:10:23,713 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:10:23,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2021-02-21 20:10:23,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/792cbd688/648c656a06494dbabc3fddde531e858d/FLAGb46393201 [2021-02-21 20:10:24,367 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:10:24,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c [2021-02-21 20:10:24,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/792cbd688/648c656a06494dbabc3fddde531e858d/FLAGb46393201 [2021-02-21 20:10:24,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/792cbd688/648c656a06494dbabc3fddde531e858d [2021-02-21 20:10:24,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:10:24,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:10:24,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:24,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:10:24,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:10:24,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:24" (1/1) ... [2021-02-21 20:10:24,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e59959c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:24, skipping insertion in model container [2021-02-21 20:10:24,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:10:24" (1/1) ... [2021-02-21 20:10:24,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:10:24,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:10:25,055 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-02-21 20:10:25,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:25,069 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:10:25,107 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1252b.c[2154,2167] [2021-02-21 20:10:25,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:10:25,131 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:10:25,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25 WrapperNode [2021-02-21 20:10:25,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:10:25,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:10:25,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:10:25,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:10:25,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25" (1/1) ... [2021-02-21 20:10:25,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25" (1/1) ... [2021-02-21 20:10:25,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25" (1/1) ... [2021-02-21 20:10:25,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25" (1/1) ... [2021-02-21 20:10:25,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25" (1/1) ... [2021-02-21 20:10:25,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25" (1/1) ... [2021-02-21 20:10:25,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25" (1/1) ... [2021-02-21 20:10:25,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:10:25,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:10:25,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:10:25,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:10:25,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25" (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 [2021-02-21 20:10:25,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:10:25,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:10:25,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:10:25,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2021-02-21 20:10:25,313 INFO L138 BoogieDeclarations]: Found implementation of procedure fmax_double [2021-02-21 20:10:25,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2021-02-21 20:10:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:10:25,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:10:25,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:10:25,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:10:25,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:10:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-02-21 20:10:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2021-02-21 20:10:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-21 20:10:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:10:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:10:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure fmax_double [2021-02-21 20:10:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2021-02-21 20:10:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:10:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:10:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:10:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:10:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-21 20:10:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:10:25,775 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:10:25,775 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-21 20:10:25,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:25 BoogieIcfgContainer [2021-02-21 20:10:25,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:10:25,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:10:25,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:10:25,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:10:25,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:10:24" (1/3) ... [2021-02-21 20:10:25,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10194cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:25, skipping insertion in model container [2021-02-21 20:10:25,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:10:25" (2/3) ... [2021-02-21 20:10:25,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10194cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:10:25, skipping insertion in model container [2021-02-21 20:10:25,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:10:25" (3/3) ... [2021-02-21 20:10:25,788 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2021-02-21 20:10:25,797 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:10:25,802 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:10:25,841 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:10:25,890 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:10:25,894 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:10:25,894 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:10:25,894 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:10:25,894 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:10:25,895 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:10:25,895 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:10:25,895 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:10:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2021-02-21 20:10:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-21 20:10:25,926 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:25,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:10:25,927 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:25,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1888106418, now seen corresponding path program 1 times [2021-02-21 20:10:25,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:25,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146420787] [2021-02-21 20:10:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:26,038 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:26,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:26,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:26,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:26,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:26,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:10:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:26,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:26,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:26,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:10:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:26,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:26,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:26,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:26,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:26,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:10:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:26,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:26,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:26,395 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:26,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:10:26,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146420787] [2021-02-21 20:10:26,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:10:26,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:10:26,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464463988] [2021-02-21 20:10:26,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:10:26,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:10:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:10:26,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:10:26,437 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2021-02-21 20:10:26,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:10:26,884 INFO L93 Difference]: Finished difference Result 169 states and 197 transitions. [2021-02-21 20:10:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:10:26,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2021-02-21 20:10:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:10:26,896 INFO L225 Difference]: With dead ends: 169 [2021-02-21 20:10:26,897 INFO L226 Difference]: Without dead ends: 86 [2021-02-21 20:10:26,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:10:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-02-21 20:10:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-02-21 20:10:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-02-21 20:10:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-02-21 20:10:26,966 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 40 [2021-02-21 20:10:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:10:26,966 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-02-21 20:10:26,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:10:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-02-21 20:10:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-21 20:10:26,970 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:26,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:10:26,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:10:26,971 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash -469021814, now seen corresponding path program 1 times [2021-02-21 20:10:26,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:26,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253991984] [2021-02-21 20:10:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:26,976 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:27,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:27,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:27,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:10:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:27,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:27,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:10:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:27,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:27,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:10:27,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:27,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:10:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:27,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:27,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,254 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:10:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:10:27,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253991984] [2021-02-21 20:10:27,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:10:27,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:10:27,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428485638] [2021-02-21 20:10:27,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:10:27,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:10:27,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:10:27,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:10:27,297 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 6 states. [2021-02-21 20:10:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:10:27,700 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2021-02-21 20:10:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:10:27,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2021-02-21 20:10:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:10:27,707 INFO L225 Difference]: With dead ends: 120 [2021-02-21 20:10:27,708 INFO L226 Difference]: Without dead ends: 91 [2021-02-21 20:10:27,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:10:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-21 20:10:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-02-21 20:10:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-02-21 20:10:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-02-21 20:10:27,755 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 50 [2021-02-21 20:10:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:10:27,756 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-02-21 20:10:27,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:10:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-02-21 20:10:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-21 20:10:27,760 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:27,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:10:27,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:10:27,761 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:27,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1028161047, now seen corresponding path program 1 times [2021-02-21 20:10:27,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:27,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034838113] [2021-02-21 20:10:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:27,770 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:27,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:27,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:27,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:10:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:27,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:27,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:27,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-02-21 20:10:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:28,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:28,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:28,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:28,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:10:28,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:28,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:28,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-21 20:10:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:10:28,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:28,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:10:28,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:10:28,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:10:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:10:28,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034838113] [2021-02-21 20:10:28,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:10:28,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 20:10:28,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350719783] [2021-02-21 20:10:28,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 20:10:28,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:10:28,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 20:10:28,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 20:10:28,081 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 6 states. [2021-02-21 20:10:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:10:28,451 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2021-02-21 20:10:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:10:28,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2021-02-21 20:10:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:10:28,454 INFO L225 Difference]: With dead ends: 124 [2021-02-21 20:10:28,454 INFO L226 Difference]: Without dead ends: 95 [2021-02-21 20:10:28,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:10:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-21 20:10:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2021-02-21 20:10:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-02-21 20:10:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-02-21 20:10:28,469 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 53 [2021-02-21 20:10:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:10:28,469 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-02-21 20:10:28,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 20:10:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-02-21 20:10:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-21 20:10:28,471 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:10:28,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:10:28,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:10:28,472 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:10:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:10:28,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1740635735, now seen corresponding path program 1 times [2021-02-21 20:10:28,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:10:28,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534237958] [2021-02-21 20:10:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:10:28,478 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:10:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:10:28,509 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:10:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:10:28,530 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:10:28,572 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:10:28,572 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:10:28,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:10:28,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:10:28 BoogieIcfgContainer [2021-02-21 20:10:28,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:10:28,605 INFO L168 Benchmark]: Toolchain (without parser) took 3828.56 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 129.4 MB in the beginning and 113.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 48.2 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:28,606 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 153.1 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:10:28,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.97 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 117.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:28,614 INFO L168 Benchmark]: Boogie Preprocessor took 75.26 ms. Allocated memory is still 153.1 MB. Free memory was 117.8 MB in the beginning and 116.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:28,615 INFO L168 Benchmark]: RCFGBuilder took 569.30 ms. Allocated memory is still 153.1 MB. Free memory was 116.1 MB in the beginning and 124.1 MB in the end (delta: -8.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:28,619 INFO L168 Benchmark]: TraceAbstraction took 2822.08 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 123.2 MB in the beginning and 113.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 42.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:10:28,629 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 153.1 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 336.97 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 117.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.26 ms. Allocated memory is still 153.1 MB. Free memory was 117.8 MB in the beginning and 116.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 569.30 ms. Allocated memory is still 153.1 MB. Free memory was 116.1 MB in the beginning and 124.1 MB in the end (delta: -8.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2822.08 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 123.2 MB in the beginning and 113.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 42.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 87]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 86, overapproximation of someUnaryDOUBLEoperation at line 82. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L83] CALL, EXPR fmax_double(x, y) [L54] CALL, EXPR __fpclassify_double(x) [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; [L54] RET, EXPR __fpclassify_double(x) [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; [L83] RET, EXPR fmax_double(x, y) [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 97 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 282 SDtfs, 59 SDslu, 510 SDs, 0 SdLazy, 380 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 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...