/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/hard-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:08:50,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:08:50,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:08:50,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:08:50,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:08:50,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:08:50,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:08:50,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:08:50,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:08:50,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:08:50,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:08:50,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:08:50,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:08:50,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:08:50,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:08:50,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:08:50,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:08:50,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:08:50,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:08:50,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:08:50,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:08:50,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:08:50,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:08:50,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:08:50,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:08:50,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 08:08:50,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 08:08:50,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 08:08:50,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 08:08:50,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 08:08:50,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 08:08:50,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 08:08:50,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 08:08:50,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:08:50,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:08:50,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:08:50,382 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 08:08:50,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:08:50,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:08:50,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:08:50,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:08:50,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:08:50,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:08:50,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:08:50,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:08:50,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:08:50,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:08:50,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:08:50,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:08:50,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:08:50,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:08:50,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:08:50,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:08:50,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:08:50,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:08:50,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:08:50,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:08:50,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:08:50,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:08:50,418 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:08:50,418 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:08:50,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:08:50,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:08:50,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:08:50,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:08:50,941 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:08:50,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-04-16 08:08:51,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25fc151cb/fb24ea9949464923a4cb320b22669b2c/FLAGc1b92c875 [2021-04-16 08:08:51,690 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:08:51,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-04-16 08:08:51,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25fc151cb/fb24ea9949464923a4cb320b22669b2c/FLAGc1b92c875 [2021-04-16 08:08:52,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25fc151cb/fb24ea9949464923a4cb320b22669b2c [2021-04-16 08:08:52,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:08:52,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:08:52,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:08:52,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:08:52,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:08:52,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:08:52" (1/1) ... [2021-04-16 08:08:52,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@607a1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52, skipping insertion in model container [2021-04-16 08:08:52,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:08:52" (1/1) ... [2021-04-16 08:08:52,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:08:52,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:08:52,397 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/hard-u_valuebound20.c[545,558] [2021-04-16 08:08:52,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:08:52,422 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:08:52,492 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/hard-u_valuebound20.c[545,558] [2021-04-16 08:08:52,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:08:52,525 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:08:52,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52 WrapperNode [2021-04-16 08:08:52,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:08:52,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:08:52,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:08:52,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:08:52,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52" (1/1) ... [2021-04-16 08:08:52,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52" (1/1) ... [2021-04-16 08:08:52,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52" (1/1) ... [2021-04-16 08:08:52,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52" (1/1) ... [2021-04-16 08:08:52,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52" (1/1) ... [2021-04-16 08:08:52,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52" (1/1) ... [2021-04-16 08:08:52,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52" (1/1) ... [2021-04-16 08:08:52,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:08:52,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:08:52,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:08:52,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:08:52,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52" (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 08:08:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:08:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:08:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:08:52,706 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:08:52,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:08:52,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:08:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:08:52,721 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-04-16 08:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:08:52,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:08:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:08:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:08:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:08:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:08:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:08:52,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:08:53,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:08:53,084 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-16 08:08:53,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:08:53 BoogieIcfgContainer [2021-04-16 08:08:53,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:08:53,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:08:53,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:08:53,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:08:53,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:08:52" (1/3) ... [2021-04-16 08:08:53,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ed09ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:08:53, skipping insertion in model container [2021-04-16 08:08:53,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:08:52" (2/3) ... [2021-04-16 08:08:53,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ed09ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:08:53, skipping insertion in model container [2021-04-16 08:08:53,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:08:53" (3/3) ... [2021-04-16 08:08:53,095 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2021-04-16 08:08:53,100 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:08:53,102 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:08:53,143 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:08:53,194 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:08:53,194 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:08:53,194 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:08:53,194 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:08:53,194 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:08:53,195 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:08:53,195 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:08:53,195 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:08:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-04-16 08:08:53,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-16 08:08:53,235 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:53,236 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:53,236 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-04-16 08:08:53,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:53,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091065646] [2021-04-16 08:08:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:53,372 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,526 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,529 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,671 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-16 08:08:53,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:08:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:08:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,734 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:08:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,739 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,739 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,744 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:08:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:53,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,794 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:53,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:08:53,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091065646] [2021-04-16 08:08:53,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:08:53,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:08:53,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073460001] [2021-04-16 08:08:53,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:08:53,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:08:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:08:53,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:08:53,812 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-04-16 08:08:54,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:08:54,116 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-04-16 08:08:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:08:54,120 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-04-16 08:08:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:08:54,125 INFO L225 Difference]: With dead ends: 69 [2021-04-16 08:08:54,126 INFO L226 Difference]: Without dead ends: 33 [2021-04-16 08:08:54,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:08:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-04-16 08:08:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-04-16 08:08:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:08:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-04-16 08:08:54,223 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-04-16 08:08:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:08:54,223 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-04-16 08:08:54,224 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-04-16 08:08:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-04-16 08:08:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-16 08:08:54,234 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:54,234 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:54,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:08:54,234 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-04-16 08:08:54,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:54,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35452203] [2021-04-16 08:08:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:54,244 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:54,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:54,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:54,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:54,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:08:54,438 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:54,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:54,444 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:54,445 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:54,450 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:54,450 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:54,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:08:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:54,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:54,515 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:54,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:08:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:54,525 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:54,527 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:54,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:08:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:54,535 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:54,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:54,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:08:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:54,542 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:54,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:08:54,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35452203] [2021-04-16 08:08:54,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:08:54,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 08:08:54,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850448091] [2021-04-16 08:08:54,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 08:08:54,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:08:54,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 08:08:54,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-16 08:08:54,550 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-04-16 08:08:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:08:54,897 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-04-16 08:08:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-16 08:08:54,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-04-16 08:08:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:08:54,900 INFO L225 Difference]: With dead ends: 46 [2021-04-16 08:08:54,900 INFO L226 Difference]: Without dead ends: 44 [2021-04-16 08:08:54,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-16 08:08:54,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-04-16 08:08:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-04-16 08:08:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:08:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-04-16 08:08:54,922 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-04-16 08:08:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:08:54,923 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-04-16 08:08:54,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-04-16 08:08:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-04-16 08:08:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-16 08:08:54,924 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:54,924 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:54,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:08:54,924 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:54,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-04-16 08:08:54,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:54,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795844627] [2021-04-16 08:08:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:54,931 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:55,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:55,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-16 08:08:55,036 INFO L142 QuantifierPusher]: treesize reduction 19, result has 83.2 percent of original size [2021-04-16 08:08:55,039 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94 [2021-04-16 08:08:55,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:55,132 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:08:55,137 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:55,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:08:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:55,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,174 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:55,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:08:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:55,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:55,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:08:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:55,181 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:55,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:08:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:55,184 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:55,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-04-16 08:08:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:08:55,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:08:55,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:08:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-16 08:08:55,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795844627] [2021-04-16 08:08:55,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:08:55,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 08:08:55,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965341602] [2021-04-16 08:08:55,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 08:08:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:08:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 08:08:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-16 08:08:55,201 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-04-16 08:08:55,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:08:55,599 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-04-16 08:08:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-16 08:08:55,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-04-16 08:08:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:08:55,601 INFO L225 Difference]: With dead ends: 50 [2021-04-16 08:08:55,601 INFO L226 Difference]: Without dead ends: 48 [2021-04-16 08:08:55,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-16 08:08:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-04-16 08:08:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-04-16 08:08:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:08:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-04-16 08:08:55,647 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-04-16 08:08:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:08:55,648 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-04-16 08:08:55,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-04-16 08:08:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-04-16 08:08:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-04-16 08:08:55,650 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:08:55,650 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:08:55,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 08:08:55,650 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:08:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:08:55,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-04-16 08:08:55,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:08:55,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719008656] [2021-04-16 08:08:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:08:55,661 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:08:55,695 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:08:55,696 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:08:55,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 08:08:55,744 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:08:55,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:08:55 BoogieIcfgContainer [2021-04-16 08:08:55,745 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:08:55,748 INFO L168 Benchmark]: Toolchain (without parser) took 3692.64 ms. Allocated memory is still 183.5 MB. Free memory was 147.8 MB in the beginning and 162.2 MB in the end (delta: -14.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:08:55,752 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 183.5 MB. Free memory is still 165.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:08:55,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 458.11 ms. Allocated memory is still 183.5 MB. Free memory was 147.6 MB in the beginning and 166.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:55,752 INFO L168 Benchmark]: Boogie Preprocessor took 23.18 ms. Allocated memory is still 183.5 MB. Free memory was 166.3 MB in the beginning and 165.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:55,753 INFO L168 Benchmark]: RCFGBuilder took 534.65 ms. Allocated memory is still 183.5 MB. Free memory was 164.7 MB in the beginning and 149.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:08:55,753 INFO L168 Benchmark]: TraceAbstraction took 2657.72 ms. Allocated memory is still 183.5 MB. Free memory was 148.5 MB in the beginning and 162.2 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:08:55,760 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 183.5 MB. Free memory is still 165.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 458.11 ms. Allocated memory is still 183.5 MB. Free memory was 147.6 MB in the beginning and 166.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.18 ms. Allocated memory is still 183.5 MB. Free memory was 166.3 MB in the beginning and 165.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 534.65 ms. Allocated memory is still 183.5 MB. Free memory was 164.7 MB in the beginning and 149.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2657.72 ms. Allocated memory is still 183.5 MB. Free memory was 148.5 MB in the beginning and 162.2 MB in the end (delta: -13.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] unsigned int A, B; [L24] unsigned int r, d, p, q; [L25] A = __VERIFIER_nondet_unsigned_int() [L26] CALL assume_abort_if_not(A>=0 && A<=20) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=20) [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B>=0 && B<=20) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B>=0 && B<=20) [L29] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(B >= 1) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2535.6ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 39.9ms, AutomataDifference: 1079.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 97 SDtfs, 92 SDslu, 77 SDs, 0 SdLazy, 233 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 509.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 607.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 111.2ms AutomataMinimizationTime, 3 MinimizatonAttempts, 14 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...