/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/recursive/Fibonacci01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:11:35,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:11:35,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:11:35,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:11:35,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:11:35,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:11:35,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:11:35,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:11:35,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:11:35,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:11:35,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:11:35,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:11:35,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:11:35,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:11:35,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:11:35,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:11:35,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:11:35,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:11:35,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:11:35,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:11:35,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:11:35,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:11:35,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:11:35,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:11:35,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:11:35,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:11:35,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:11:35,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:11:35,521 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 20:11:35,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:11:35,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:11:35,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:11:35,552 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:11:35,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:11:35,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:11:35,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:11:35,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:11:35,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:11:35,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:11:35,555 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:11:35,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:11:35,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:11:35,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:11:35,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:11:35,556 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:11:35,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:11:35,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:11:35,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:11:35,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:11:35,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:11:35,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:11:35,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:11:36,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:11:36,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:11:36,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:11:36,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:11:36,051 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:11:36,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c [2021-02-21 20:11:36,144 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798e6bb06/9529bbc11a214d02a7eda1978e0a93a2/FLAGb835dc1d7 [2021-02-21 20:11:36,693 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:11:36,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c [2021-02-21 20:11:36,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798e6bb06/9529bbc11a214d02a7eda1978e0a93a2/FLAGb835dc1d7 [2021-02-21 20:11:37,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798e6bb06/9529bbc11a214d02a7eda1978e0a93a2 [2021-02-21 20:11:37,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:11:37,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:11:37,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:11:37,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:11:37,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:11:37,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:11:37" (1/1) ... [2021-02-21 20:11:37,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151968b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37, skipping insertion in model container [2021-02-21 20:11:37,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:11:37" (1/1) ... [2021-02-21 20:11:37,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:11:37,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:11:37,303 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c[804,817] [2021-02-21 20:11:37,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:11:37,316 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:11:37,333 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c[804,817] [2021-02-21 20:11:37,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:11:37,349 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:11:37,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37 WrapperNode [2021-02-21 20:11:37,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:11:37,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:11:37,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:11:37,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:11:37,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37" (1/1) ... [2021-02-21 20:11:37,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37" (1/1) ... [2021-02-21 20:11:37,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37" (1/1) ... [2021-02-21 20:11:37,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37" (1/1) ... [2021-02-21 20:11:37,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37" (1/1) ... [2021-02-21 20:11:37,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37" (1/1) ... [2021-02-21 20:11:37,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37" (1/1) ... [2021-02-21 20:11:37,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:11:37,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:11:37,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:11:37,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:11:37,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37" (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 20:11:37,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:11:37,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:11:37,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:11:37,541 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-02-21 20:11:37,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:11:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:11:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:11:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:11:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:11:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:11:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-02-21 20:11:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:11:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:11:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:11:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:11:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:11:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:11:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:11:37,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:11:37,795 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:11:37,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:11:37 BoogieIcfgContainer [2021-02-21 20:11:37,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:11:37,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:11:37,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:11:37,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:11:37,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:11:37" (1/3) ... [2021-02-21 20:11:37,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52dd7300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:11:37, skipping insertion in model container [2021-02-21 20:11:37,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:37" (2/3) ... [2021-02-21 20:11:37,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52dd7300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:11:37, skipping insertion in model container [2021-02-21 20:11:37,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:11:37" (3/3) ... [2021-02-21 20:11:37,806 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2021-02-21 20:11:37,813 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:11:37,818 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:11:37,839 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:11:37,869 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:11:37,870 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:11:37,870 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:11:37,870 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:11:37,870 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:11:37,870 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:11:37,870 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:11:37,871 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:11:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-02-21 20:11:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-21 20:11:37,900 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:37,901 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] [2021-02-21 20:11:37,902 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:37,910 INFO L82 PathProgramCache]: Analyzing trace with hash 754086871, now seen corresponding path program 1 times [2021-02-21 20:11:37,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:37,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371529339] [2021-02-21 20:11:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:38,035 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:38,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:38,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:38,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:38,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:38,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:38,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:38,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:38,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:38,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:38,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:38,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:38,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:38,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:38,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:38,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:38,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:38,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:38,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 20:11:38,416 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 20:11:38,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371529339] [2021-02-21 20:11:38,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:38,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:11:38,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160440418] [2021-02-21 20:11:38,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:11:38,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:38,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:11:38,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:11:38,450 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 8 states. [2021-02-21 20:11:39,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:39,197 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-02-21 20:11:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:11:39,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2021-02-21 20:11:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:39,209 INFO L225 Difference]: With dead ends: 59 [2021-02-21 20:11:39,209 INFO L226 Difference]: Without dead ends: 39 [2021-02-21 20:11:39,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:11:39,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-21 20:11:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-02-21 20:11:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-21 20:11:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-02-21 20:11:39,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2021-02-21 20:11:39,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:39,268 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-02-21 20:11:39,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:11:39,268 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-02-21 20:11:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-21 20:11:39,270 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:39,271 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] [2021-02-21 20:11:39,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:11:39,271 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash -213937358, now seen corresponding path program 1 times [2021-02-21 20:11:39,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:39,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585202607] [2021-02-21 20:11:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:39,277 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:39,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:39,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:39,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:39,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:39,341 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-21 20:11:39,342 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-21 20:11:39,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:39,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:39,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:39,465 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:39,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:39,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:39,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:39,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:39,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:39,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:39,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 20:11:39,563 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 20:11:39,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585202607] [2021-02-21 20:11:39,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:39,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:11:39,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401985990] [2021-02-21 20:11:39,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:11:39,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:39,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:11:39,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:11:39,572 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2021-02-21 20:11:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:39,955 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-02-21 20:11:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:11:39,956 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2021-02-21 20:11:39,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:39,958 INFO L225 Difference]: With dead ends: 47 [2021-02-21 20:11:39,958 INFO L226 Difference]: Without dead ends: 41 [2021-02-21 20:11:39,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:11:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-21 20:11:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-02-21 20:11:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-21 20:11:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-02-21 20:11:39,975 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 28 [2021-02-21 20:11:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:39,976 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-02-21 20:11:39,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:11:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-02-21 20:11:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 20:11:39,978 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:39,978 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:11:39,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:11:39,979 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:39,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1480948785, now seen corresponding path program 1 times [2021-02-21 20:11:39,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:39,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674897406] [2021-02-21 20:11:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:39,983 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,107 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,142 WARN L141 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size [2021-02-21 20:11:40,143 WARN L147 QuantifierPusher]: treesize reduction 6, result has 33.3 percent of original size 3 [2021-02-21 20:11:40,148 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:11:40,156 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:40,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:40,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-21 20:11:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-21 20:11:40,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674897406] [2021-02-21 20:11:40,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:40,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 20:11:40,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034418388] [2021-02-21 20:11:40,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 20:11:40,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 20:11:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:11:40,214 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2021-02-21 20:11:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:40,469 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-02-21 20:11:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:11:40,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2021-02-21 20:11:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:40,472 INFO L225 Difference]: With dead ends: 63 [2021-02-21 20:11:40,472 INFO L226 Difference]: Without dead ends: 41 [2021-02-21 20:11:40,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:11:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-21 20:11:40,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-02-21 20:11:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-02-21 20:11:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-02-21 20:11:40,487 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 44 [2021-02-21 20:11:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:40,488 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-02-21 20:11:40,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 20:11:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-02-21 20:11:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-21 20:11:40,490 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:40,490 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 20:11:40,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:11:40,491 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:40,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:40,492 INFO L82 PathProgramCache]: Analyzing trace with hash -189469004, now seen corresponding path program 1 times [2021-02-21 20:11:40,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:40,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947412130] [2021-02-21 20:11:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:40,495 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:40,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:40,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:40,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:11:40,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-21 20:11:40,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:40,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,696 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,697 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:40,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:40,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:40,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:40,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:40,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:40,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-21 20:11:40,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947412130] [2021-02-21 20:11:40,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:40,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-21 20:11:40,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708675016] [2021-02-21 20:11:40,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-21 20:11:40,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:40,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-21 20:11:40,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-21 20:11:40,750 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2021-02-21 20:11:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:41,461 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-02-21 20:11:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-21 20:11:41,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2021-02-21 20:11:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:41,464 INFO L225 Difference]: With dead ends: 59 [2021-02-21 20:11:41,464 INFO L226 Difference]: Without dead ends: 53 [2021-02-21 20:11:41,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-02-21 20:11:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-21 20:11:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2021-02-21 20:11:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-02-21 20:11:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-02-21 20:11:41,482 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 45 [2021-02-21 20:11:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:41,482 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-02-21 20:11:41,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-21 20:11:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-02-21 20:11:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-21 20:11:41,485 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:41,485 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:11:41,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:11:41,486 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1181749608, now seen corresponding path program 1 times [2021-02-21 20:11:41,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:41,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618581342] [2021-02-21 20:11:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:41,489 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:41,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:41,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:41,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:41,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:41,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:41,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:41,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:41,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:41,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:41,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:41,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:41,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:41,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:41,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:41,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,658 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:41,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:41,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:41,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:41,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:41,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-02-21 20:11:41,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618581342] [2021-02-21 20:11:41,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:41,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:11:41,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362845603] [2021-02-21 20:11:41,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:11:41,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:41,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:11:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:11:41,687 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 8 states. [2021-02-21 20:11:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:42,119 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-02-21 20:11:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:11:42,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2021-02-21 20:11:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:42,125 INFO L225 Difference]: With dead ends: 84 [2021-02-21 20:11:42,126 INFO L226 Difference]: Without dead ends: 51 [2021-02-21 20:11:42,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:11:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-21 20:11:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-02-21 20:11:42,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-21 20:11:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-02-21 20:11:42,158 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 64 [2021-02-21 20:11:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:42,159 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-02-21 20:11:42,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:11:42,159 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-02-21 20:11:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-21 20:11:42,171 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:42,171 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:11:42,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 20:11:42,171 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1062763502, now seen corresponding path program 2 times [2021-02-21 20:11:42,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:42,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988818061] [2021-02-21 20:11:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:42,179 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,282 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,283 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,316 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,364 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-21 20:11:42,365 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-21 20:11:42,376 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-21 20:11:42,376 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-21 20:11:42,388 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-21 20:11:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-21 20:11:42,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988818061] [2021-02-21 20:11:42,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:42,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 20:11:42,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607306113] [2021-02-21 20:11:42,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 20:11:42,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:42,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 20:11:42,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:11:42,432 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 9 states. [2021-02-21 20:11:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:42,745 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2021-02-21 20:11:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 20:11:42,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2021-02-21 20:11:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:42,747 INFO L225 Difference]: With dead ends: 85 [2021-02-21 20:11:42,747 INFO L226 Difference]: Without dead ends: 51 [2021-02-21 20:11:42,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:11:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-21 20:11:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-02-21 20:11:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-21 20:11:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-02-21 20:11:42,763 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 62 [2021-02-21 20:11:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:42,763 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-02-21 20:11:42,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 20:11:42,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-02-21 20:11:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-21 20:11:42,764 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:42,765 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:11:42,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 20:11:42,765 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:42,766 INFO L82 PathProgramCache]: Analyzing trace with hash -745129785, now seen corresponding path program 3 times [2021-02-21 20:11:42,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:42,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196681312] [2021-02-21 20:11:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:42,768 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,797 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,798 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:42,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:42,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,867 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,868 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:11:42,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-21 20:11:42,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:42,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:11:42,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,928 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-21 20:11:42,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:42,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,938 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:42,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-21 20:11:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:42,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:42,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:42,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-02-21 20:11:43,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196681312] [2021-02-21 20:11:43,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:43,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 20:11:43,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248583766] [2021-02-21 20:11:43,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 20:11:43,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 20:11:43,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:11:43,019 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 14 states. [2021-02-21 20:11:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:43,934 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-02-21 20:11:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 20:11:43,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2021-02-21 20:11:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:43,936 INFO L225 Difference]: With dead ends: 69 [2021-02-21 20:11:43,936 INFO L226 Difference]: Without dead ends: 63 [2021-02-21 20:11:43,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2021-02-21 20:11:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-21 20:11:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2021-02-21 20:11:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-21 20:11:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-02-21 20:11:43,953 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 63 [2021-02-21 20:11:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:43,953 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-02-21 20:11:43,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 20:11:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-02-21 20:11:43,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-21 20:11:43,955 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:43,955 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-02-21 20:11:43,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 20:11:43,956 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:43,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1589190530, now seen corresponding path program 4 times [2021-02-21 20:11:43,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:43,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097977209] [2021-02-21 20:11:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:43,959 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:43,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:43,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:43,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:43,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:44,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,102 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-21 20:11:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,154 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,155 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-21 20:11:44,157 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-21 20:11:44,168 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-21 20:11:44,169 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-21 20:11:44,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-21 20:11:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-02-21 20:11:44,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097977209] [2021-02-21 20:11:44,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:44,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-21 20:11:44,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383246629] [2021-02-21 20:11:44,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-21 20:11:44,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:44,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-21 20:11:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-02-21 20:11:44,236 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 11 states. [2021-02-21 20:11:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:44,757 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2021-02-21 20:11:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 20:11:44,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 98 [2021-02-21 20:11:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:44,759 INFO L225 Difference]: With dead ends: 106 [2021-02-21 20:11:44,760 INFO L226 Difference]: Without dead ends: 70 [2021-02-21 20:11:44,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-02-21 20:11:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-21 20:11:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-02-21 20:11:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-02-21 20:11:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-02-21 20:11:44,781 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 98 [2021-02-21 20:11:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:44,781 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-02-21 20:11:44,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-21 20:11:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-02-21 20:11:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-02-21 20:11:44,784 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:44,784 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 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 20:11:44,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 20:11:44,784 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2037596062, now seen corresponding path program 5 times [2021-02-21 20:11:44,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:44,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41004619] [2021-02-21 20:11:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:44,788 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,897 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,920 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:44,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:44,963 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:44,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:44,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-21 20:11:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:44,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:44,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:45,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-21 20:11:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:45,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:45,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:11:45,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:45,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:45,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:45,055 WARN L141 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size [2021-02-21 20:11:45,055 WARN L147 QuantifierPusher]: treesize reduction 6, result has 53.8 percent of original size 7 [2021-02-21 20:11:45,069 WARN L141 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size [2021-02-21 20:11:45,070 WARN L147 QuantifierPusher]: treesize reduction 1, result has 87.5 percent of original size 7 [2021-02-21 20:11:45,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:45,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:45,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:45,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:45,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,112 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:45,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:45,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:45,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-21 20:11:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:45,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:45,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-21 20:11:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:45,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:45,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-02-21 20:11:45,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41004619] [2021-02-21 20:11:45,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:45,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-02-21 20:11:45,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157014637] [2021-02-21 20:11:45,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-21 20:11:45,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:45,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-21 20:11:45,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-21 20:11:45,169 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 15 states. [2021-02-21 20:11:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:45,947 INFO L93 Difference]: Finished difference Result 132 states and 174 transitions. [2021-02-21 20:11:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-21 20:11:45,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 134 [2021-02-21 20:11:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:45,951 INFO L225 Difference]: With dead ends: 132 [2021-02-21 20:11:45,951 INFO L226 Difference]: Without dead ends: 85 [2021-02-21 20:11:45,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-02-21 20:11:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-21 20:11:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-02-21 20:11:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-21 20:11:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2021-02-21 20:11:45,985 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 134 [2021-02-21 20:11:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:45,985 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2021-02-21 20:11:45,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-02-21 20:11:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2021-02-21 20:11:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-02-21 20:11:45,987 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:45,987 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-02-21 20:11:45,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 20:11:45,988 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:45,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1069346308, now seen corresponding path program 6 times [2021-02-21 20:11:45,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:45,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984860828] [2021-02-21 20:11:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:45,991 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:46,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:46,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:46,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:46,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:46,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-02-21 20:11:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:11:46,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,097 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-21 20:11:46,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:46,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,130 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,131 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:11:46,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-21 20:11:46,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:46,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,143 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:11:46,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-21 20:11:46,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:46,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:46,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-21 20:11:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,212 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:46,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-02-21 20:11:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:46,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:11:46,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-02-21 20:11:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,275 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,275 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:46,276 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,276 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-02-21 20:11:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:46,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:46,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:46,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-02-21 20:11:46,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984860828] [2021-02-21 20:11:46,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:46,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-02-21 20:11:46,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270065349] [2021-02-21 20:11:46,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-21 20:11:46,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:46,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-21 20:11:46,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-02-21 20:11:46,305 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 16 states. [2021-02-21 20:11:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:47,236 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2021-02-21 20:11:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 20:11:47,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 98 [2021-02-21 20:11:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:47,237 INFO L225 Difference]: With dead ends: 76 [2021-02-21 20:11:47,237 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 20:11:47,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-02-21 20:11:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 20:11:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 20:11:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 20:11:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 20:11:47,240 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2021-02-21 20:11:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:47,240 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 20:11:47,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-02-21 20:11:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 20:11:47,240 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 20:11:47,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 20:11:47,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 20:11:48,949 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 21 [2021-02-21 20:11:49,081 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 17 [2021-02-21 20:11:49,291 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 17 [2021-02-21 20:11:49,459 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 22 [2021-02-21 20:11:49,738 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 19 [2021-02-21 20:11:49,975 WARN L202 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 19 [2021-02-21 20:11:50,150 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 21 [2021-02-21 20:11:50,480 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 21 [2021-02-21 20:11:50,715 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 20:11:50,715 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 20:11:50,715 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 20:11:50,716 INFO L185 CegarLoopUtils]: At program point fibonacciFINAL(lines 16 24) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1)) (< 1 fibonacci_~n)) (and (or (and (<= |fibonacci_#in~n| 1) (<= 1 |fibonacci_#res|) (<= |fibonacci_#res| 1)) (and (<= |fibonacci_#in~n| 0) (<= 0 |fibonacci_#res|) (<= |fibonacci_#res| 0))) .cse0))) [2021-02-21 20:11:50,716 INFO L192 CegarLoopUtils]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2021-02-21 20:11:50,716 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (< 1 fibonacci_~n)) [2021-02-21 20:11:50,716 INFO L185 CegarLoopUtils]: At program point L22-1(line 22) the Hoare annotation is: (and (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 2)) (<= 3 fibonacci_~n) .cse0) (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 1)) .cse0))) (< 1 fibonacci_~n)) [2021-02-21 20:11:50,716 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| 1) (= fibonacci_~n |fibonacci_#in~n|) (< 0 fibonacci_~n)) [2021-02-21 20:11:50,717 INFO L185 CegarLoopUtils]: At program point L22-2(line 22) the Hoare annotation is: (and (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 2)) (<= 3 fibonacci_~n) .cse0) (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 1)) .cse0))) (< 1 fibonacci_~n)) [2021-02-21 20:11:50,717 INFO L185 CegarLoopUtils]: At program point L19(lines 19 23) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (< 0 fibonacci_~n)) [2021-02-21 20:11:50,717 INFO L185 CegarLoopUtils]: At program point L22-3(line 22) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|)) (.cse1 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret7| |fibonacci_#t~ret8| 1)))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 1)) .cse0 .cse1 (< 1 fibonacci_~n)) (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 2)) (<= 3 fibonacci_~n) .cse0 .cse1))) [2021-02-21 20:11:50,717 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (and (= fibonacci_~n |fibonacci_#in~n|) (<= |fibonacci_#in~n| 0)) [2021-02-21 20:11:50,718 INFO L185 CegarLoopUtils]: At program point L22-4(line 22) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|)) (.cse1 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret7| |fibonacci_#t~ret8| 1)))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 1)) .cse0 .cse1 (< 1 fibonacci_~n)) (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 2)) (<= 3 fibonacci_~n) .cse0 .cse1))) [2021-02-21 20:11:50,718 INFO L185 CegarLoopUtils]: At program point fibonacciEXIT(lines 16 24) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1)) (< 1 fibonacci_~n)) (and (or (and (<= |fibonacci_#in~n| 1) (<= 1 |fibonacci_#res|) (<= |fibonacci_#res| 1)) (and (<= |fibonacci_#in~n| 0) (<= 0 |fibonacci_#res|) (<= |fibonacci_#res| 0))) .cse0))) [2021-02-21 20:11:50,718 INFO L185 CegarLoopUtils]: At program point L17(lines 17 23) the Hoare annotation is: (= fibonacci_~n |fibonacci_#in~n|) [2021-02-21 20:11:50,718 INFO L185 CegarLoopUtils]: At program point L22-5(line 22) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|)) (.cse1 (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1))) (.cse2 (<= |fibonacci_#in~n| (+ |fibonacci_#t~ret7| |fibonacci_#t~ret8| 1)))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 1)) .cse0 .cse1 .cse2 (< 1 fibonacci_~n)) (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 2)) (<= 3 fibonacci_~n) .cse0 .cse1 .cse2))) [2021-02-21 20:11:50,718 INFO L185 CegarLoopUtils]: At program point L22-6(line 22) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|)) (.cse1 (<= |fibonacci_#in~n| (+ |fibonacci_#res| 1)))) (or (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 1)) .cse0 .cse1 (< 1 fibonacci_~n)) (and (<= fibonacci_~n (+ |fibonacci_#t~ret7| 2)) (<= 3 fibonacci_~n) .cse0 .cse1))) [2021-02-21 20:11:50,718 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-21 20:11:50,718 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-21 20:11:50,719 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 20:11:50,719 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-21 20:11:50,719 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-21 20:11:50,719 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-21 20:11:50,719 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 20:11:50,719 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-21 20:11:50,719 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-21 20:11:50,719 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-21 20:11:50,720 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-21 20:11:50,720 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 20:11:50,720 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 20:11:50,720 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-21 20:11:50,720 INFO L185 CegarLoopUtils]: At program point L33(lines 33 37) the Hoare annotation is: (<= main_~x~0 (+ main_~result~0 1)) [2021-02-21 20:11:50,720 INFO L192 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: true [2021-02-21 20:11:50,720 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) the Hoare annotation is: false [2021-02-21 20:11:50,720 INFO L185 CegarLoopUtils]: At program point L32-1(line 32) the Hoare annotation is: (<= main_~x~0 (+ |main_#t~ret10| 1)) [2021-02-21 20:11:50,721 INFO L192 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: true [2021-02-21 20:11:50,721 INFO L185 CegarLoopUtils]: At program point L32-2(line 32) the Hoare annotation is: (<= main_~x~0 (+ |main_#t~ret10| 1)) [2021-02-21 20:11:50,721 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 27 38) the Hoare annotation is: true [2021-02-21 20:11:50,721 INFO L192 CegarLoopUtils]: At program point L29(lines 29 31) the Hoare annotation is: true [2021-02-21 20:11:50,721 INFO L185 CegarLoopUtils]: At program point L32-3(line 32) the Hoare annotation is: (and (<= main_~x~0 (+ main_~result~0 1)) (<= main_~x~0 (+ |main_#t~ret10| 1))) [2021-02-21 20:11:50,721 INFO L192 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: true [2021-02-21 20:11:50,721 INFO L192 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: true [2021-02-21 20:11:50,721 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 27 38) the Hoare annotation is: true [2021-02-21 20:11:50,722 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 27 38) the Hoare annotation is: true [2021-02-21 20:11:50,722 INFO L185 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: false [2021-02-21 20:11:50,722 INFO L185 CegarLoopUtils]: At program point L36-1(line 36) the Hoare annotation is: false [2021-02-21 20:11:50,722 INFO L192 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: true [2021-02-21 20:11:50,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:11:50 BoogieIcfgContainer [2021-02-21 20:11:50,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:11:50,750 INFO L168 Benchmark]: Toolchain (without parser) took 13656.03 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 136.3 MB in the beginning and 244.8 MB in the end (delta: -108.5 MB). Peak memory consumption was 160.6 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:50,750 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:11:50,751 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.11 ms. Allocated memory is still 152.0 MB. Free memory was 135.3 MB in the beginning and 125.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:50,751 INFO L168 Benchmark]: Boogie Preprocessor took 34.13 ms. Allocated memory is still 152.0 MB. Free memory was 125.9 MB in the beginning and 124.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:50,757 INFO L168 Benchmark]: RCFGBuilder took 410.41 ms. Allocated memory is still 152.0 MB. Free memory was 124.3 MB in the beginning and 122.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:50,764 INFO L168 Benchmark]: TraceAbstraction took 12949.02 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 122.5 MB in the beginning and 244.8 MB in the end (delta: -122.3 MB). Peak memory consumption was 147.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:50,769 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.11 ms. Allocated memory is still 152.0 MB. Free memory was 135.3 MB in the beginning and 125.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.13 ms. Allocated memory is still 152.0 MB. Free memory was 125.9 MB in the beginning and 124.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 410.41 ms. Allocated memory is still 152.0 MB. Free memory was 124.3 MB in the beginning and 122.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12949.02 ms. Allocated memory was 152.0 MB in the beginning and 263.2 MB in the end (delta: 111.1 MB). Free memory was 122.5 MB in the beginning and 244.8 MB in the end (delta: -122.3 MB). Peak memory consumption was 147.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 16]: Procedure Contract for fibonacci Derived contract for procedure fibonacci: ((n == \old(n) && \old(n) <= \result + 1) && 1 < n) || ((((\old(n) <= 1 && 1 <= \result) && \result <= 1) || ((\old(n) <= 0 && 0 <= \result) && \result <= 0)) && n == \old(n)) - ProcedureContractResult [Line: 27]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.3s, OverallIterations: 10, TraceHistogramMax: 13, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 345 SDtfs, 720 SDslu, 747 SDs, 0 SdLazy, 1760 SolverSat, 303 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 334 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=9, 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, 10 MinimizatonAttempts, 31 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 44 LocationsWithAnnotation, 380 PreInvPairs, 651 NumberOfFragments, 401 HoareAnnotationTreeSize, 380 FomulaSimplifications, 43897 FormulaSimplificationTreeSizeReduction, 1.4s HoareSimplificationTime, 44 FomulaSimplificationsInter, 9078 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, 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 proved your program to be correct! Received shutdown request...